New Semester
Started
Get
50% OFF
Study Help!
--h --m --s
Claim Now
Question Answers
Textbooks
Find textbooks, questions and answers
Oops, something went wrong!
Change your search query and then try again
S
Books
FREE
Study Help
Expert Questions
Accounting
General Management
Mathematics
Finance
Organizational Behaviour
Law
Physics
Operating System
Management Leadership
Sociology
Programming
Marketing
Database
Computer Network
Economics
Textbooks Solutions
Accounting
Managerial Accounting
Management Leadership
Cost Accounting
Statistics
Business Law
Corporate Finance
Finance
Economics
Auditing
Tutors
Online Tutors
Find a Tutor
Hire a Tutor
Become a Tutor
AI Tutor
AI Study Planner
NEW
Sell Books
Search
Search
Sign In
Register
study help
physics
mechanics
University Physics with Modern Physics 13th edition Hugh D. Young, Roger A. Freedman, A. Lewis Ford - Solutions
A baseball is thrown from the roof of a 22.0-m-tall building with an initial velocity of magnitude 12.0 m/s and directed at an angle of 53.10 above the horizontal. (a) What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance. (b) What is the
A crate of mass M starts from rest at the top of a frictionless ramp inclined at an angle a above the horizontal. Find its speed at the bottom of the ramp, a distance d from where it started. Do this in two ways: (a) Take the level at which the potential energy is zero to be at the bottom of the
Answer part (b) of Example 7.6 (Section 7.1) by applying Eq. (7.7) to points 2 and 3, rather than to points 1 and 3 as was done in the example.
An empty crate is given an initial push down a ramp, starting it with a speed vo and reaches the bottom with speed v and kinetic energy K. Some books are now placed in the crate, so that the total mass is quadrupled. The coefficient of kinetic friction is constant and air resistance is negligible.
A Small rock with mass 0.20 kg is released from rest at point A, which is at the top edge of a large, hemispherical bowl with radius R = 050 m (Fig. 7.25) Assume that the size of the rock is small compared to R, so that the rock can be treated as a particle, and assume that the rock slides rather
A stone of mass m is thrown upward at an angle θ above the horizontal and feels no appreciable air resistance. Use conservation of energy to show that at its highest point, it is a distance V02 (sin2 (J)/2g above the point where it was launched. (Hint: vt = v0: + vo2)
You are testing a new amusement park roller coaster with an empty car with mass 120 kg. One part of the track is a vertical loop with radius 12.0 m. At the bottom of the loop (point A) the car has speed 25.0 m/s, and at the top of the loop (point B) it has speed 8.0 m/s. As the car rolls from point
Tarzan and Jane Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 20 m that makes an angle of 45° with the vertical, steps off his tree limb, and swings down and then up to Jane's open arms. When he arrives, his vine makes an angle of 30° with the vertical.
A 10.0-kg microwave oven is pushed 8.00 m up the sloping surface of a loading ramp inclined at an angle of 36.9° above the horizontal, by a constant force F with a magnitude 110 N and acting parallel to the ramp. The coefficient of kinetic friction between the oven and the ramp is 0.250. (a)
Pendulum a small rock with mass 0.12 kg is fastened to a mass less string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45° with the vertical. Air resistance is negligible. (a) What is the speed of the rock when the string passes through the
A force of 800 N stretches a certain spring a distance of 0.200 m. (a) What is the potential energy of the spring when it is stretched 0.200 m? (b) What is its potential energy when it is compressed 5.00 cm?
An ideal spring of negligible mass is 12.00 cm long when nothing is attached to it. When you hang a 3.15-kg weight from it, you measure its length to be 13.40 cm. If you wanted to store 10.0 J of potential energy in this spring, what would be its total length? Assume that it continues to obey
A spring stores potential energy Uo when it is compressed a distance xo from its uncompressed length. (a) In terms of Uo, how much energy does it store when it is compressed (i) twice as much and (ii) half as much? (b) In terms of xo, how much must it be compressed from its uncompressed length
A slingshot will shoot a l0-g pebble 22.0 m straight up. (a) How much potential energy is stored in the slingshot's rubber band? (b) With the same potential energy stored in the rubber band, how high can the slingshot shoot a 25-g pebble? (c) What physical effects did you ignore in solving
A spring of negligible mass has force constant k = 1600 N/m. (a) How far must the spring be compressed for 3.20 J of potential energy to be stored in it? (b) You place the spring vertically with one end on the floor. You then drop a 1.20-kg book onto it from a height of 0.80 m above the top of
A 1.20-kg piece of cheese is placed on a vertical spring of negligible mass and force constant k = 1800 N/m that is compressed 15.0 cm. When the spring is released, how high does the cheese rise from this initial position? (The cheese and the spring are not attached.)
Consider the glider of Example 7.7 (Section 7.2) and Fig. 7.16. As in the example, the glider is released from rest with the spring stretched 0.100 m. What is the displacement x of the glider from its equilibrium position when its speed is 0.20 m/s? (You should get more than one answer. Explain
Consider the glider of Example 7.7 (Section 7.2) and Fig. 7.16. (a) As in the example, the glider is released from rest with the spring stretched 0.100 m. What is the speed of the glider when it returns to x = O? (b) What must the initial displacement of the glider be if its maximum speed in
A 2.50-kg mass is pushed against a horizontal spring of force constant 25.0 N/cm on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. When the spring has been compressed enough to store 11.5 J of potential energy in it, the mass
(a) For the elevator of Example 7.9 (Section 7.2), what is the speed of the elevator after it has moved downward 1.00 m from point 1 in Fig. 7.17? (b) When the elevators 1.00 m below point 1 in Fig. 7.17, what is its acceleration?
You are asked to design a spring that will give a 1160-kg satellite a speed of 2.50 m/ s relative to an orbiting space shuttle. Your spring is to give the satellite a maximum acceleration of 5.00g. The spring's mass, the recoil kinetic energy of the shuttle, and changes in gravitational potential
A 75-kg roofer climbs a vertical 7.0-m ladder to the flat roof of a house. He then walks 12 m on the roof, climbs down another vertical 7.0-m ladder, and finally walks on the ground back to his starting point. How much work is done on him by gravity? (a) as he climbs up; (b) as he climbs down;
A 10.0-kg box is palled by a horizontal wire in a circle on a rough horizontal surface for which the coefficient of kinetic friction is 0.250. Calculate the work done by friction during one complete circular trip if the radius is (a) 2.00 m and (b) 4.00 m. (c) On the basis of the results you
In an experiment, one of the forces exerted on a proton is F = -ax2i, where a = 12 N/m2. (a) How much work does F do when the proton moves along the straight-line path from the point (0.10m, 0) to the point (0.10 m, O.40m)? (b) Along the straight-line path from the point (0.10 m, 0) to the point
A 0.60-kg book slides on a horizontal table. The kinetic friction force on the book has magnitude 1.2 N. (a) How much work is done on the book by friction during a displacement of 3.0 m to the left? (b) The book now slides 3.0 m to the right, returning to its starting point. During this second
You are three friends stand at the comers of a square whose sides are S.O m long in the middle of the gym floor, as shown in Fig. 7.26. You rake your physics book and push it from one person to the other. The book has a mass of is kg, and the coefficient of kinetic friction between the book and the
A block with mass m is attached to an ideal spring that has force constant k. (a) The block moves from x, to x" where x, > x,. How much work does the spring force do during this disparagement? (b) The block moves from XI to X2 and then from x, to XI. How much work does the spring force do
The potential energy of a pair of hydrogen atoms separated by a large distance X is given by Vex) = -c61x6, where Co is a positive constant. What is the force that one atom exerts on the other? Is this force attractive or repulsive?
A force parallel to the x-axis acts on a particle moving along the x-axis. This force produces potential energy vex) given by v(x) = ax', where a = 1.20 11m'. What is the force (magnitude and direction) when the particle is at X = -0.800 m?
Gravity in One Dimension two point masses, ml and m2, lie on the x-axis, with m, held in place at the origin and m, at position x and free to move. The gravitational potential energy of these masses is found to be Vex) = -Gm1 m2/x. where G is a constant (called the gravitational constant). You'll
Gravity in Two Dimensions Two point masses, m, and m2, lie in the xy-plane, with m, held in place at the origin and m2 free to move a distance r away at a point P having coordinates X and y (Fig. 7.27). The gravitational potential energy of these masses in found to be U(r) = - Gm1m2/r, where G is
An object moving in the xy-plane is acted on by a conservative force described by the potential-energy function V(x, y) = aUlx2 + l/y2), where a is a positive constant. Derive an expression for the force expressed in terms of the unit vectors i and j.
The potential energy of two atoms in a diatomic molecule is approximated by V(r) = a/r12 - b/r2, where r is the spacing between atoms and a and b are positive constants. (a) Find the force F( r) on one atom as a function of r. Make two graphs, once of V( r) versus r and one of F( r) versus r.
A marble moves along the x-axis. The potential-energy function is shown in Fig.(a) At which of the labeled x-coordinates is the force on the marble zero?(b) Which of the labeled x-coordinates is a position of stable equilibrium?(c) Which of the labeled x-coordinates is a position of unstable
At a construction site, a 65.O-kg bucket of concrete hangs from a light (but strong) cable that passes over a light friction-free pulley and is connected to an SO.O-kg box on a horizontal roof (Fig. 7.29). The cable pulls horizontally on the box, and a 50.O-kg bag of gravel rests on top of the box.
Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is suspended from the ceiling. The masses are released from rest, and the more massive one starts to descend. After this block has descended 1.20 m, its speed is 3.00 m/s. If
Legal Physics In an auto accident, a car hit a pedestrian and the driver then slammed on the brakes to stop the car. During the subsequent trial, the driver's lawyer claimed that he was obeying the posted 35 mi/h speed limit, but that the legal speed was too high to allow him to see and react to
A 2.00-kg block is pushed against a spring with negligible mass and force constant k = 400 N/m, compressing it 0.220 m. When the block is released, it moves along a frictionless, horizontal surface and then up a frictionless incline with slope 37.0 (Fig. 7.30). (a) What is the speed of the block
A block with mass 0.50 kg is forced against a horizontal spring of negligible mass, compressing the spring a distance of 0.20 m (Fig. 7.31). When released, the block moves 00 a horizontal tabletop for 1.00 m before coming to rest. The spring constant k is 100 N/m. What is the coefficient of kinetic
On a horizontal surface, a crate with mass 50.0 kg is placed against a spring that stores 360 of energy. The spring is released, and the crate slides 5.60 m before coming to rest. What is the speed of the crate when it is 2.00 m from its initial position?
Bouncing Ball A 650-gram rubber ball is dropped from an initial height of 250 m, and on each bounce it returns to 75% of its previous height (a) What is the initial mechanical energy of the ball, just after it is released from its initial height? (b) How much mechanical energy does the ball
Riding a Loop-the-Loop A car in an amusement park ride rolls without friction around the track shown in Fig. 7.32. It starts from rest at point A at a height h above the bottom of the loop. Treat the car as a particle. (a) What is the minimum value of h (in terms of R) such that the car moves
A 2.9-kg piece of wood slides on the surface shown in Fig. 7.33 The curved sides are perfectly smooth, but the rough horizontal bottom is 30 m long and has a kinetic friction coefficient of 0.20 with the wood. The piece of wood starts from rest 4.0 m above the rough bottom.(a) Where will this wood
Up and Down the Hill. A 28-kg rock approaches the foot of a hill with a speed of 15 m/s. This hill slopes upward at a constant angle of 40.0" above the horizontal. The coefficients of static and kinetic friction between the hill and the rock are 0.75 and 0.20, respectively. (a) Use energy
A 15.0-kg stone slides down a snow-covered hill (Fig. 7.34), leaving point A with a speed of 10.0 m/s. There is no friction on the hill between points A and B, but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough horizontal region,
A 2.8-kg block slides over the smooth, icy hill shown in Fig. 7.35. The top of the hill is horizontal and 70 m higher than its base. What minimum speed must the block have at the base of the hill so that it will not fall into the pit on the far side of the hill?
Bungee Jump a bungee cord is 30.0 m long and, when stretched a distance x, it exerts a restoring force of magnitude. Your father-in-law (mass 95.0 kg) stands on a platform 45.0 m above the ground, and one end of the cord is tied securely to his ankle and the other end to the platform. You have
Ski Jump Ramp. You are designing a ski jump ramp for the next Water Olympics. You need to calculate the vertical height h from the starting gate to the bottom of the ramp. The skiers push off hard with their ski poles at the start, just above the starting gate, so they typically have a speed of 2.0
The Great Sandini is a 6O-kg circus performer who is shot from a cannon (actually a spring gun). You don't find many men of his caliber, so you help him design a new gun. This new gun has a very large spring with a very small mass and a force constant of 1100 N/m that he will compress with a force
You are designing a delivery ramp for crates containing exercise equipment The l470-N crates will move at 1.8 m/s at the top of a ramp that slopes downward at 22.0°. The ramp exerts a 550-N kinetic friction force on each crate, and the maximum static friction force also has this value. Each crate
A system of two paint buckets connected by a lightweight rope is released from rest with the 12.0-kg bucket 2.00 m above the floor (Fig. 7.36). Use the principle of conservation of energy to find the speed with which this bucket strikes the floor. You can ignore friction and the mass of the pulley.
A 1500-kg rocket is to be launched with an initial upward speed of 50.0 m/s. In order to assist its engines, the engineers will start it from rest on a ramp that rises 53° above the horizontal (Fig. 7.37). At the bottom, the ramp turns upward and launches the rocket vertically. The engines
A machine part of mass m is attached to a horizontal ideal spring of force constant k that is attached to the edge of a friction free horizontal surface. The part is pushed against the spring, compressing it a distance Xo, and then released from rest. Find the maximum (a) speed and (h) acceleration
A wooden rod of negligible mass and length 80.0 cm is pivoted about a horizontal axis through its center. A white rat with mass 0.500 kg clings to one end of the stick, and a mouse with mass 0.200 kg clings to the other end. The system is released from rest with the rod horizontal. If the animals
A O.100-kg potato is tied to a string with length 2.50 m, and the other end of the string is tied to a rigid support. The potato is held straight out horizontally from the point of support, with the string palled taut, and is then released. (a) What is the speed of the potato at the lowest point
These data are from 8 computer simulation for 8 batted baseballs with mass 0.1451rg, including air resistance:(a) How much work was done by the air on the baseball as it moved from its initial position to its maximum height?(b) How much work was done by the air on the baseball as it moved from its
Down the Pole a fireman of mass m slides a distance d down 8 poles he starts from rest. Removes as fast at the bottom as if he had stepped off a platform a distance h s d shoves the ground and descended with negligible air resistance, (a) What average friction force did the fireman exert on the
A 6Cl.O-kg skier starts from rest at the top of a ski slope 65.0 m high. (a) H frictional forces do 10.5 k1 of work on her as she descends bow fast is she going at 1he bottom of 1he slope? (b) Now moving horizontally, 1he skier crosses 8 patch of soft snow, where μk = 0.20. H the patch is
A skier starts at the top of a very large, frictionless snowball, with a very small initial speed, and skis straight down 1he side (Fig. 7.38). At what point does she lose contact with the snowball and By off at a tangent? That is, at the instant she loses contact with the snowball, what angle a
A rock is tied to a cord and the other end of the cord is held fixed. The rock is given an initial tangential velocity that causes it to rotate in a vertical circle. Prove that the tension in the cord at 1he lowest point exceeds the tension at the highest point by six times the weight of the rock.
In a truck-loading station at a post office a small O.200-kg Package is released from rest at point A on a track that is one-quarter of a circle with radius 1.60 m (Fig. 7.39). The size of the package is much less than 1.60111,so1hepackagecan be treated as a particle. It slides down the track and
A truck with mass m has a brake failure while going down an icy mountain road of constant downward slope angle a (Fig. 7.40). Initially the truck is moving downhill at speed vo. After careening downhill a distance L with negligible friction, the truck driver steers 1he runaway vehicle onto 8
A certain spring is found not to obey Hooke's law; it exerts a restoring force Fx(x) = -ax _1Jx2 if it is stretched or compressed where a - 60.0 N/m and f3 - 18.0 N/m2. The mass of 1he spring is negligible. (a) Calculate 1he potential energy function U(x) for this spring. Let U = 0 when x = O.
A variable force F is maintained tangent to a frictionless, semicircular surface (Fig. 7 AI). By slow variations in the force a block with weight w is moved, and the spring to which it is attached is stretched from position 1 to position 2. The spring has negligible mass and force constant k. The
A 0.150-kg block of ice is placed against a horizontal, compressed spring mounted on a horizontal tabletop that is 1.20 m above the floor. The spring has force constant 1900 N/m and is initially compressed 0.045 m. The mass of the spring is negligible. The spring is released, and the block slides
A 3.00-kg block is connected to two ideal horizontal springs having force constants k, = 25.0 N/cm and k2 = 20.0N/cm (Fig. 7.42). The system is initially in equilibrium on a horizontal, frictionless surface. The block is now pushed 15.0 cm to the right and released from rest. (a) What is the
An experimental apparatus with mass m is placed on a vertical spring of negligible mass and pushed down until the spring is compressed a distance x. The apparatus is then released and reaches its maximum height at a distance h above the point where it is released. The apparatus is not attached to
If a fish is attached to a vertical spring and slowly lowered to its equilibrium position, it is found to stretch the spring by an amount d. If the same fish is attached to the end of the unscratched spring and then allowed to fall from rest, through what maximum distance does it stretch the
A wooden block with mass 1.50 kg is placed against a compressed spring at the bottom of an incline of slope 30.00 (point A). When the spring is released, it projects the block up the incline. At point B, a distance of 6.00 m up the incline from A, the block is moving up the incline at 7.00 m/s and
A 2.00-kg package is released on a 53.10 incline 4.00 m from a long spring with force constant 120 N/m that is attached at the bottom of the incline (Fig. 7.43). The coefficients of friction between the package and the incline are IL. = 0.40 and μk = 0.20. The mass of the spring is
A 0.500-kg block, attached to a spring with length 0.60 m and force constant 40.0 N/m, is at rest with the back of the block at point A on a frictionless, horizontal air table (Fig. 7.44). The mass of the spring is negligible. You move the block to the right along the surface by pulling with a
Fraternity Physics the brothers of Iota Eta Pi fraternity build a platform, supported at all four comers by vertical springs, in the basement of their frat house. A brave fraternity brother wearing a football helmet stands in the middle of the platform; his weight compresses the springs by 0.18 m.
A particle with mass m is acted on by a conservative force and moves along a path given by x = xo cos w0t and y = yosinwot, where x, yo, and wo are constants. (a) Find the components of the force that acts on the particle. (b) Find the potential energy of the particle as a function of x and y. Take
When it is burned, 1 gallon of gasoline produces 1.3 x 108 I of energy. A 1500-kg car accelerates from rest to 37 m/s in 10 s. The engine of this car is only 15% efficient (which is typical), meaning that only 15% of the energy from the combustion of the gasoline is used to accelerate the car. The
A hydroelectric dam holds back a lake of surface area 3.0 X 106 m2 that has vertical sides below the water level. The water level in the lake is 150 m above the base of the dam. When the water passes through turbines at the base of the dam, its mechanical energy is converted into electrical energy
How much total energy is stored in the lake in Problem 7.79? As in that problem, take the gravitational potential energy to be zero at the base of the dam. Express your answer in joules and in kilowatt-hours. (Hint: Break the lake up into infinitesimal horizontal layers of thickness dy, and
Gravity in Three Dimensions a point mass ml is held in place at the origin, and another point mass m2 is free to move a distance r away at a point P having coordinates x, y, and z. The gravitational potential energy of these masses is found to be U(r) = -Gm1/m2/r, where G is the gravitational
(a) Is the force F = Cy2j, where C is a negative constant with units of N/m2 , conservative or non-conservative? Justify your answer. (b) Is the force F = Cy2i, where C is a negative constant with units of N/m2, conservative or non-conservative? Justify your answer.
A cutting tool under microprocessor control has several forces acting on it. One force is F = _axy2j, a force in the negative y-direction whose magnitude depends on the position of the tool. The constant is a = 2.50 N/m3. Consider the displacement of the tool from the origin to the point x = 3.00
An object has several forces acting on it. One force is F = axfi, a force in the x-
A Hooke's law force -Toe and a constant conservative force F in the +x-direction act on an atomic ion (a) Show that a possible potential-energy function for this combination of forces is U(x) = Toe - Fx - F2/2k. Is this the only possible function? Explain. (b) Find the stable equilibrium
A particle moves along the x-axis while acted on by a single conservative force parallel to the x. axis. The force corresponds to the potential-energy function graphed in Fig. 7.45. The particle is released from rest at point A. (a) What is the direction of the force on the particle when it is at
A proton with mass m moves in one dimension. The potential-energy function is U(x) = alx2- B/x, where a and p are positive constants. The proton is released from rest at Xo = alp.(a) Show that U(x) can be written as Graph U(x). Calculate U(xo) and thereby locate the point Xo on the graph.(b)
(a) What is the magnitude of the momentum of a 10,000-kg truck whose speed is 12.0 m/s? (b) What speed would a 2,000-kg SUV have to attain in order to have (i) the same moment? (ii) the same kinetic energy?
In Conceptual Example 8.1 (Section 8.1), show that the iceboat with mass 2m has V 2 times as much moment at the finish line as does the iceboat with mass m.
(a) Show that the kinetic energy K and the momentum magnitude p of a particle with mass m are related by K = p2/2m. (b) A 0.040-kg cardinal (Richmondena cardinalis) and a 0.145-kg baseball have the same kinetic energy. Which has the greater magnitude of moment? What is the ratio of the cardinal's
In a certain men's track and field event, the shotput has a mass of 7.30 kg and is released with a speed of 15.0 m/s at 40.0 above the horizontal over a man's straight left leg. What are the initial horizontal and vertical components of the momentum of this shotput?
One 110-kg football lineman is running to the right at 2.75 m/s while another 125-kg lineman is running directly toward him at 2.60 m/s. What are? (a) The magnitude and direction of the net momentum of these two athletes, and (b) Their total kinetic energy?
Two vehicles are approaching an intersection. One is a 2500- kg pickup traveling at 14.0 m/s from east to west (the - x-direction), and the other is a 1500-kg sedan going from south to north (the +y-direction at 23.0 m/s). (a) Find the x- and y-components of the net momentum of this system. (b)
Force of B Golf Swing A 0.0450-kg golf ball initially at rest is given a speed of 25.0 m/s when a club strikes. If the club and ball are in contact for 2.00 ms, what average force acts on the ball? Is the effect of the ball's weight during the time of contact significant? Why or why not?
Force of B Baseball Swing A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of 45.0 m/s and the batted ball's velocity is 55.0 m/s in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.
A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t = 0, the puck is moving to the right at 3.00 m/s. (a) Calculate the velocity of the puck (magnitude and direction) after a force of 25.0 N directed to the right has been applied for 0.050 s. (b) If, instead, a
An engine of the orbital maneuvering system (OMS) on a space shuttle exerts a force of (26,700 N)j for 3.90 s, exhausting a negligible mass of fuel relative to the 95,000-kg mass of the shuttle. (a) What is the impulse of the force for this 3.90 s? (b) What is the shuttle's change in momentum
At time t = 0, a 2150-kg rocket in outer space fires an engine that exerts an increasing force on it in the + x-direction. This force obeys the equation F. = At2, where t is time, and has a magnitude of 781.25 N when t = 1.25 s. (a) Find the SI value of the constant A, including its units. (b)
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 50.0 m/s, and it leaves the bat traveling to the left at an angle of 30° above horizontal with a speed of 65.0 m/s. If the ball and bat are in contact for 1.75 ms, find the horizontal and
A 2.00-kg stone is sliding to the right on a frictionless horizontal surface at 5.00 m/s when it is suddenly struck by an object that exerts a large horizontal force on it for a short period of time. The graph in Fig. 8.34 shows the magnitude of this force as a function of time.(a) What impulse
A 68.5-kg astronaut is doing a repair in space on the orbiting space station. She throws a 2.25-kg tool away from her at 3.20 m/s relative to the space station. With what speed and in what direction will she begin to move?
Animal Propulsion Squids and octopuses propel themselves by expelling water. They do this by keeping water in a cavity and then suddenly contracting the cavity to force out the water through an opening. A 6.50-kg squid (including the water in the cavity) at rest suddenly sees a dangerous predator.
You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. A friend throws you a 0.400-kg ball that is traveling horizontally at 10.0 m/s. Your mass is 70.0 kg. (a) If you catch the ball, with what speed
On a frictionless, horizontal air table, puck A (with mass 0.250 kg) is moving toward puck B (with mass 0.350 kg), which is initially at rest. After the collision, puck A has a velocity of 0.120m/s to the left, and puck B has a velocity ofO.650m/s to the right. (a) What was the speed of puck A
Showing 1800 - 1900
of 21795
First
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Last
Step by Step Answers