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Applied Physics 10th Edition Dale ewen, Neill schurter, P. erik gundersen - Solutions
A horizontal cable supports the boom of a crane. If the tension in the cable is 4500–N and the crane is supporting a 7500-N girder, what is the compression in theboom?
1. Concurrent forces act at(a) Two or more different points. (b) The same point. (c) The origin.2. The resultant force is(a) The last force applied.(b) The single force that has the same effect as two or more forces acting together.(c) Equal to either diagonal when using the parallelogram method to
1. Is motion produced every time a force is applied to an object?2. What is the relationship between opposing forces on a body that is in equilibrium?3. Define equilibrium.4. In what direction does the force due to gravity always act?
1. What may be said about concurrent forces whose sum of x-components equals zero and whose sum of y-components equals zero?2. What is a force diagram?3. Is the length of the pedal necessarily the true length of the torque arm in pedaling a bicycle?4. In your own words, explain the second condition
1. What is the primary consideration in the selection of a point of rotation in an equilibrium problem?2. List three examples from daily life in which you use the concept of center of gravity.3. Is the center of gravity of an object always at its geometric center?4. On a 3.00-m scaffold of uniform
A coach knows it is vital that the volleyballs be fully inflated before a match. (a) Calculate the impulse on a spiked 0.123-slug volleyball when the incoming velocity of the ball is – 11.5 ft/s and the outgoing velocity is 57.3 ft/s. (b) Using physics terms, explain what would happen to the
An automobile accident causes both the driver and passenger front airbags to deploy. (a) If the vehicle was traveling at a speed of 88.6 km/h and is now at rest, find the change in momentum for both the 68.4-kg adult driver and the 34.2-kg child passenger. (b) The adult took 0.564 s and the child
Several African tribes engage in a ritual much like bungee jumping, in which a tree vine is used instead of a bungee cord. (a) A 70.8-kg person falls from a cliff with such a vine attached to his ankles. Find the force applied to his ankles if it takes 0.355 s to change his velocity from – 18.5
Sally, who weighs 125 lb, knows that getting out of a 65.5-lb canoe can be a difficult experience.(a) What happens to the canoe’s velocity if she attempts to step out of the canoe and onto the dock with a velocity of 3.50 ft/s? (b) If the canoe were heavier, would it be easier or harder to step
An automobile accident investigator needs to determine the initial westerly velocity of a Jeep (m = 1720kg) that may have been speeding before colliding head-on with a Volkswagen (m = 1510 kg) that was moving with a velocity of 75.7 km/h east. The speed limit on this road is 90 km/h. After the
Find the momentum of each object.1. m = 2.00 kg, v = 40.0 m/s2. m = 5.00 kg, v = 90.0 m/s3. m = 17.0 slugs, v = 45.0 ft/s4. m = 38.0 kg, v = 97.0 m/s5. m = 3.8 x 105 kg, v = 2.5 x 103 m/s6. m = 3.84 kg, v = 1.6 x 105 m/s7. Fw = 1.50 x 105 N, v = 4.50 x 104 m/s8. Fw = 3200 lb, v = 60 mi/h (change to
(a) Find the momentum of a heavy automobile of mass 180 slugs traveling 70.0 ft/s.(b) Find the velocity of a light auto of mass 80.0 slugs so that it has the same momentum as the auto in part (a). (c) Find the weight (in lb) of each auto in parts (a) and (b).
(a) Find the momentum of a bullet of mass 1.00 x 10–3 slug traveling 700 ft/s.(b) Find the velocity of a bullet of mass 5.00 x 10–4 slug so that it has the same momentum as the bullet in part (a).
(a) Find the momentum of an automobile of mass 2630 kg traveling 21.0 m/s.(b) Find the velocity (in km/h) of a light auto of mass 1170 kg so that it has the same momentum as the auto in part (a).
A ball of mass 0.50 kg is thrown straight up at 6.0 m/s.(a) What is the initial momentum of the ball?(b) What is the momentum of the ball at its peak?(c) What is the momentum of the ball as it hits the ground?
A bullet with mass 60.0 g is fired with an initial velocity of 575 m/s from a gun with mass 4.50 kg. What is the speed of the recoil of the gun?
A cannon is mounted on a railroad car. The cannon shoots a 1.75-kg ball with a muzzle velocity of 300 m/s. The cannon and the railroad car together have a mass of 4500 kg. If the ball, cannon, and railroad car are initially at rest, what is the recoil velocity of the car and cannon?
A 125-kg pile driver falls from a height of 10.0 m to hit a piling.(a) What is its speed as it hits the piling?(b) With what momentum does it hit the piling?
A person is traveling 75.0 km/h in an automobile and throws a bottle of mass 0.500 kg out the window.(a) With what momentum does the bottle hit a roadway sign?(b) With what momentum does the bottle hit an oncoming automobile traveling 85.0 km/h in the opposite direction?(c) With what momentum does
A 75.0-g bullet is fired with a muzzle velocity of 460 m/s from a gun with mass 3.75 kg and barrel length of 66.0 cm.(a) How long is the bullet in the barrel?(b) What is the force on the bullet while it is in the barrel?(c) Find the impulse exerted on the bullet while it is in the barrel.(d) Find
A 60.0-g bullet is fired at a muzzle velocity of 525 m/s from a gun with mass 4.50 kg and a barrel length of 55.0 cm.(a) How long is the bullet in the barrel?(b) What is the force on the bullet while it is in the barrel?(c) Find the impulse exerted on the bullet while it is in the barrel.(d) Find
(a) What force is required to stop a 1250-kg car traveling 95.0 km/h within 4.00 s?(b) How far does the car travel during its deceleration?
(a) What force is required to slow a 1350-kg car traveling 90.0 km/h to 25.0 km/h within 4.00 s? (b) How far does the car travel during its deceleration? (c) How long does it take for the car to come to a complete stop at this same rate of deceleration?
What force is required to stop a 3000-kg truck going 35.0 km/h within 5.00 s?
What force is needed to stop a piece of heavy equipment moving 10.0 km/h in 6.00 s if its mass is 5000 kg?
One ball of mass 0.500 kg traveling 6.00 m/s to the right collides with a ball of mass 0.200 kg initially at rest. After the collision, the heavier ball is traveling 2.57 m/s to the right. What is the velocity of the lighter ball after the collision?
A ball of mass 625 g traveling 4.00 m/s to the right collides with another ball of equal mass that is initially at rest. The first ball is at rest after the collision. (a) What is the velocity of the second ball after the collision? (b) What is the velocity of the second ball if the mass of the two
A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
A 90.0-g disk traveling 3.00 m/s to the right collides with a 75.0-g disk traveling 8.00 m/s to the left. After the collision, the heavier disk is traveling 7.00 m/s to the left. What is the velocity of the lighter disk after the collision?
A 98.0-kg parts cart with rubber bumpers rolling 1.20 m/s to the right crashes into a similar cart of mass 125 kg moving left at 0.750 m/s. After the collision, the lighter cart is traveling 0.986 m/s to the left. What is the velocity of the heavier cart after the collision?
A 75.0-kg paint cart with rubber bumpers is rolling 0.965 m/s to the right and strikes a second cart of mass 85.0 kg moving 1.30 m/s to the left. After the collision, the heavier cart is traveling 0.823 m/s to the right. What is the velocity of the lighter cart after the collision?
A railroad car of mass 2.00 x 104 kg is traveling north 6.00 m/s and collides with a railroad car of mass 1.50 x 104 kg traveling south 4.00 m/s. Find the velocity of the railroad cars that become coupled after the collision.
Find the velocity of the railroad cars in Problem 7 if the lighter car is initially at rest.In Problem 7 A railroad car of mass 2.00 x 104 kg is traveling north 6.00 m/s and collides with a railroad car of mass 1.50 x 104 kg traveling south 4.00 m/s. Find the velocity of the railroad cars that
One cart of mass 12.0 kg is moving 6.00 m/s to the right on a frictionless track and collides with a cart of mass 4.00 kg moving in the opposite direction 3.00 m/s. Find the final velocity of the carts that become stuck together after the collision.
One cart of mass 15.0 kg is moving 5.00 m/s to the right on a frictionless track and collides with a cart of mass 3.00 kg. The final velocity of the carts that become stuck together after the collision is 1.50 m/s to the right. Find the velocity of the second cart before the collision.
A 1650-kg automobile moving south 12.0 m/s collides with a 2450-kg automobile moving north on an icy road. The automobiles stick together and move 3.00 m/s to the north after the collision. What is the speed of the heavier automobile before the collision?
A 16.0-g bullet is shot into a wooden block at rest with mass 4550 g on a frictionless surface. The block moves 1.20 m/s after the bullet strikes and becomes lodged in the block. Find the speed of the bullet before striking the block.
A 2450-kg automobile moving north 12.0 m/s collides with a 1650-kg automobile moving 8.00 m/s on an icy road. The automobiles stick together and move after the collision. Find the velocity of the automobiles after the collision if the automobiles were traveling in?(a) Opposite directions(b) The
Two motorcycles of equal mass collide at a 90° intersection. If the momentum of motorcycle A is 450 kg km/h west and the momentum of motorcycle B is 725 kg km/h south, what is the magnitude of the resulting momentum of the final mass?
Two pickup trucks crash at a 90° intersection. If the momentum of pickup A is 4.60 x 104 kg km/h north and the momentum of pickup B is 6.25 x 104 kg km/h east, what is the magnitude of the resulting momentum of the final mass?
Two vehicles collide at a 90° intersection. If the momentum of vehicle A is 6.10 x 105 kg km/h south and the momentum of vehicle B is 7.20 x 105 kg km/h east, what is the magnitude of the resulting momentum of the final mass?
Two vehicles of equal mass collide at a 90° intersection. If the momentum of vehicle A is 1.20 × 105 kg km/h east and the momentum of vehicle B is 8.50 × 104 kg km/h north, what is the resulting momentum of the final mass?
A vehicle with a mass of 1000 kg is going east at a velocity of 30.0 m/s. It collides with a stationary vehicle of the same mass and is deflected 35.0° north of its original course. The second vehicle’s final path is 90° to the right of the final path of the first vehicle. (a) What is the
Ball A with a mass of 0.500 kg is moving east at a velocity of 0.800 m/s. It strikes ball B, also of mass 0.500 kg, which is stationary. Ball A glances off B at an angle of 40.0° north of its original path. Ball B is pushed along a path perpendicular to the final path of ball A. (a) What is the
A vehicle with mass of 950 kg is driving east with velocity 12.0 m/s. It crashes into a stationary vehicle of the same mass. Assume an elastic collision. The first vehicle is deflected at an angle of 40.0° north of its original path. The second vehicle’s path is 90° to the right of the first
A vehicle with a mass of 800 kg is traveling west with a velocity of 20.0 m/s. It collides with a vehicle of the same mass that is not moving. Assume an elastic collision. the first vehicle is deflected at 30.0° north from its original path. The second vehicle’s path is 90° to the left of the
1. A truck with mass 1475 slugs travels 57.0 mi/h. Find its momentum.2. A projectile with mass 27.0kg is fired with a momentum of 5.50kg m/s. Find its velocity.3. A box is pushed with a force of 125 N for 2.00 min. What is the impulse?4. What is the momentum of a bullet of mass 0.034 kg traveling
A 150-kg pile driver falls from a height of 7.5 m to hit a piling. (a) What is its speed as it hits the piling? (b) With what momentum does it hit the piling?
A 15.0-g bullet is fired at a muzzle velocity of 3250 m/s from a high-powered rifle with a mass of 4.75 kg and barrel of length 75.0 cm. (a) How long is the bullet in the barrel? (b) What is the force on the bullet while it is in the barrel? (c) Find the impulse exerted on the bullet while it is in
What force is required to slow a 1250-kg car traveling 115 km/h to 30.0 km/h within 3.50 s? (a) How far does the car travel during its deceleration? (b) How long does it take for the car to come to a complete stop at this same rate of deceleration?
One ball of mass 575 g traveling 3.50 m/s to the right collides with another ball of mass 425 g that is initially at rest. After the collision, the lighter ball is traveling 4.03 m/s. What is the velocity of the heavier ball after the collision?
A railroad car of mass 2.25 x 104 kg is traveling east 5.50 m/s and collides with a railroad car of mass 3.00 x 104 kg traveling west 1.50 m/s. Find the velocity of the railroad cars that become coupled after the collision.
A 195-g ball traveling 4.50 m/s to the right collides with a 125-g ball traveling 12.0 m/s to the left. After the collision, the heavier ball is traveling 8.40 m/s to the left. What is the velocity of the lighter ball after the collision?
Two trucks of equal mass collide at a 90° intersection. If the momentum of truck A is 9.50 x 104 kg km/h east and the momentum of truck B is 1.05 x 105 kg km/h north, what is the resulting momentum of the final mass, assuming the trucks remain joined together following the crash?
Ball A, of mass 0.35 kg, has a velocity 0.75 m/s east. It strikes a stationary ball, also of mass 0.35 kg. Ball A deflects off B at an angle of 37.0° north of A’s original path. Ball B moves in a line 90° right of the final path of A. (a) Find ball A’s momentum after the collision. (b) Find
1. Momentum is(a) Equal to speed times weight.(b) Equal to mass times velocity.(c) The same as force.2. Impulse is(a) A force applied to an object.(b) The initial force applied to an object.(c) The initial momentum applied to an object.(d) The change in momentum due to a force being applied to an
1. Describe in your own words the law of conservation of momentum.2. Describe conservation of momentum in terms of a rocket being fired.3. One billiard ball striking another is an example of a(n) _____ collision.4. One moving loaded railroad car striking and coupling with a parked empty railroad
Rosita needs to purchase a sump pump for her basement.(a) If the pump must carry 10.0 kg of water to a height of 2.75 m each minute, what minimum wattage pump is needed?(b) What three main factors determine power for a sump pump?
A roller coaster designer must carefully balance the desire for excitement and the need for safety. The most recent design is shown in Figure.(a) If a 355-kg roller coaster car has zero velocity on the top of the first hill, determine its potential energy. (b) What is the velocity of the roller
A 22,500-kg Navy fighter jet flying 235 km/h must catch an arresting cable to land safely on the runway strip of an aircraft carrier.(a) How much energy must the cable absorb to stop the fighter jet?(b) If the cable allows the jet to move 115 m before coming to rest, what is the average force that
The hydroelectric plant at the Itaipu Dam, located on the Parana River between Paraguay and Brazil, uses the transfer of potential to kinetic energy of water to generate electricity. (a) If 1.00 x 106 gallons of water (3.79 x 106 kg) flows down 142 m into the turbines each second, how much power
A 1250-kg wrecking ball is lifted to a height of 12.7 m above its resting point. When the wrecking ball is released, it swings toward an abandoned building and makes an indentation of 43.7 cm in the wall.(a) What is the potential energy of the wrecking ball at a height of 12.7 m? (b) What is its
1. Given: F = 10.0 Ns = 3.43 mW =?2. Given: F = 125 Ns = 4875 mW =?3. Given: F = 1850 Ns = 625 mθ = 37.5°W =?4. Given: W = 697 ft lbs = 976 ftF =?5. Given: F = 25,700 Ns = 238 mW = 5.57 x 106 Jθ =?6. Given: F = mam = 16.0 kga = 9.80 m/s2s = 13.0 mW =?
1. How much work is required for a mechanical hoist to lift a 9000-N automobile to a height of 1.80 m for repairs?2. A hay wagon is used to move bales from the field to the barn. The tractor pulling the wagon exerts a constant force of 350 lb. The distance from field to barn is mi. How much work
1. A gardener pushes a mower a distance of 900 m in mowing a yard. The handle of the mower makes an angle of 40.0° with the ground. The gardener exerts a force of 35.0 N along the handle of the mower (Figure). How much work does the gardener do in mowing the lawn?2. The handle of a vegetable
1. Two students push a dune buggy 35.0 m across a lot. The force required is 825 N. How much work is done?2. After a rain, the force necessary to push the dune buggy in Problem through the mud is doubled. How does the amount of work done by the students change?3. A delivery person carries a 215-N
1. Given: W = 132 Jt = 7.00 sP =?2. Given: P = 231 ft lb/st = 14.3 sW =?3. Given: P = 75.0 WW = 40.0 Jt =?4. Given: W = 55.0 Jt = 11.0 sP =?5. The work required to lift a crate is 310 J. If the crate is lifted in 25.0 s, what power is developed?
When a 3600-lb automobile runs out of gas, it is pushed by its unhappy driver and a friend a quarter of a mile (0.250 mi). To keep the car rolling, they must exert a constant force of 175 lb. (a) How much work do they do? (b) If it takes them 15.0 min, how much power do they develop? (c) Expressed
An electric golf cart develops 1.25 kW of power while moving at a constant speed.(a) Express its power in horsepower.(b) If the cart travels 200 m in 35.0 s, what force is exerted by the cart?
1. How many seconds would it take a 7.00-hp motor to raise a 475-lb boiler to a platform 38.0 ft high?2. How long would it take a 950-W motor to raise a 360-kg mass to a height of 16.0 m?
A 1500-lb casting is raised 22.0 ft in 2.50 min. Find the required horsepower.
1. What is the rating in kW of a 2.00-hp motor?2. A wattmeter shows that a motor is drawing 2200W. What horsepower is being delivered?3. A 525-kg steel beam is raised 30.0 m in 25.0 s. How many kilowatts of power are needed?
How long would it take a 4.50-kW motor to raise a 175-kg boiler to a platform 15.0 m above the floor?
A 475-kg prestressed concrete beam is to be raised 10.0 m in 24.0 s. How many kilowatts of power are needed for the job?
A 50.0-kg welder is to be raised 15.0 m in 12.0 s. How many kilowatts of power are needed for the job?
An escalator is needed to carry 75 passengers per minute a vertical distance of 8.0 m. Assume that the mass of each passenger is 70 kg.(a) What is the power (in kW) of the motor needed? (b) Express this power in horsepower. (c) What is the power (in kW) of the motor needed if 35% of the power is
1. A pump is needed to lift 750 L of water per minute a distance of 25.0 m. What power (in kW) must the pump be able to deliver? (1 L of water has a mass of 1 kg.)2. A machine is designed to perform a given amount of work in a given amount of time. A second machine does twice the same amount of
A motor on an escalator is capable of developing 12 kW of power. (a) How many passengers of mass 75 kg each can it lift a vertical distance of 9.0 m per min, assuming no power loss? (b) What power, in kW, motor is needed to move the same number of passengers at the same rate if 45% of the actual
A pump is capable of developing 4.00 kW of power. How many litres of water per minute can be lifted a distance of 35.0 m? (1 L of water has a mass of 1 kg.)
1. A pallet weighing 575 N is lifted a distance of 20.0 m vertically in 10.0 s. What power is developed in kilowatts?2. A pallet is loaded with bags of cement; the total weight of 875 N is lifted 21.0 m vertically in 11.0 s. What power in kilowatts is required to lift the cement?3. A bundle of
An ironworker carries a 7.50-kg toolbag up a vertical ladder on a high-rise building under construction.(a) After 30.0 s, he is 8.20 m above his starting point. How much work does the worker do on the toolbag?(b) If the worker weighs 645 N, how much work does he do in lifting himself and the
1. Given: m = 11.4 kgg = 9.80 m/s2h = 22.0 mEp =?2. Given: m = 3.50 kgg = 9.80 m/s2h = 15.0 mEp =?3. Given: m = 4.70 kgv = 9.60 m/sEk =?4. Given: Ep = 93.6 Jg = 9.80 m/s2h = 2.30 mh =?
A truck with mass 950 slugs is driven 55.0 mi/h. (a) What is its velocity in ft/s?(b) What is its kinetic energy?
1. A bullet with mass 12.0 g travels 415 m/s. Find its kinetic energy. (Convert 12.0 g to kg.)2. A bicycle and rider together have a mass of 7.40 slugs. If the kinetic energy is 742 ft lb, find the velocity.3. A crate of mass 475 kg is raised to a height 17.0 m above the floor. What potential
A tank of water containing 2500 L of water is stored on the roof of a building.(a) Find its potential energy with respect to the floor, which is 12.0 m below the roof.(b) Find its potential energy with respect to the basement, which is 4.0 m below the first floor.
1. The potential energy of a girder, after being lifted to the top of a building, is 5.17 x 105 ft lb. If its mass is 173 slugs, how high is the girder?2. A 30.0-g bullet is fired from a gun and possesses 1750 J of kinetic energy. Find its velocity.3. The Hoover Dam is 726 ft high. Find the
Water is pumped at 250m3/min from a lake into a tank 65.0 m above the lake.(a) What power, in kW, must be delivered by the pump? (b) What horsepower rating does this pump motor have? (c) What is the increase in potential energy of the water each minute?
Oil is pumped at 25.0m3/min into a tank 10.0 m above the ground. (1 L of oil has a mass of 0.68 kg.) (a) What power, in kW, must be delivered by the pump?(b) What is the increase in potential energy of the oil after 10.0 min? (c) Find the increase in potential energy of the oil after 10.0 min if
If the velocity of an object is doubled, by what factor is its kinetic energy increased?
If the kinetic energy of an object is doubled, by what factor is its velocity increased?
A 4.20-g slug is shot from a rifle at 965 m/s.(a) What is the kinetic energy of the slug?(b) How much work is done on the slug if it starts from rest?(c) Find the average force on the slug if the work is done over a distance of 0.750 m.(d) If the slug comes to rest after penetrating 1.50 cm into
A window washer with mass 90.0 kg first climbs 45.0 m upward to the top of a building, then from the top goes down 85.0 m to the ground.(a) What is the potential energy of the window washer at the top of the building, using his initial position as the reference level?(b) Find the potential energy
A painter weighing 630 N climbs to a height of 5.00 m on a ladder.(a) How much work does she do in climbing the ladder?(b) What is the increase in gravitational potential energy of the painter?(c) Where does the energy come from to cause this increase in potential energy?
1. A pile driver falls a distance of 2.50 m before hitting a pile. Find its velocity as it hits the pile.2. A sky diver jumps out of a plane at a height of 5000 ft. If her parachute does not open until she reaches 1000 ft, what is her velocity at that point if air resistance is disregarded?3. A
A 10.0-kg mass is dropped from a hot air balloon at a height of 325 m above the ground. Find its speed at points 300 m, 200 m, and 100 m above the ground and as it hits the ground.
1. A 0.175-lb ball is thrown upward with an initial velocity of 75.0 ft/s. What is the maximum height reached by the ball?2. A pile driver falls a distance of 1.75 m before hitting a pile. Find its velocity as it hits the pile.3. A sandbag is dropped from a hot air balloon at a height of 125 m
A piece of broken glass with mass 15.0 kg falls from the side of a building 8.00 m above the street. (a) What is the kinetic energy of the glass as it hits the street?(b) What is the speed of the glass as it hits the street?
1. A ball is thrown downward from the top of a building at a speed of 75 ft/s. Find its velocity as it hits the ground 475 ft below. Disregard air resistance.2. Find the maximum height reached by a ball thrown upward at a velocity of 95 ft/s.
A 4.000-kg mass is dropped from a hot air balloon 300.0 m above the ground. Find its kinetic energy, its potential energy, and the sum of the kinetic energy and the potential energy in 1-s intervals until the mass hits the ground. (Assume no air resistance.)
A 2.00-kg projectile is fired vertically upward with an initial velocity of 98.0 m/s. Find its kinetic energy, its potential energy, and the sum of its kinetic and potential energies at each of the following times:(a) The instant of its being fired(b) t = 1.00 s(c) t = 2.00 s(d) t _ 5.00 s(e) t =
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