A truck is hauling a 300-kg log out of a ditch using a winch attached to the
Question:
A truck is hauling a 300-kg log out of a ditch using a winch attached to the back of the truck. Knowing the winch applies a constant force of 2500 N and the coefficient of kinetic friction between the ground and the log is 0.45, determine the time for the log to reach a speed of 0.5m/s.
20°
Step by Step Answer:
Apply the principle of impulse and momentum to the log ...View the full answer
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073398242
11th edition
Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self
Related Video
Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.
Students also viewed these Mechanics questions
-
The surface of a radiation shield facing a black hot wall at 400 K has a reflectivity of 0.95. Attached to the back side of the shield is a 25-mm-thick sheet of insulating material having a thermal...
-
An object of mass 306 g is attached to the base of a spring, with spring constant 25 N/m, that is hanging from the ceiling. A pen is attached to the back of the object, so that it can write on a...
-
A 0.2-cm-thick, 10-cm-high, and 15-cm-long circuit board houses electronic components on one side that dissipate a total of 15 W of heat uniformly. The board is impregnated with conducting metal...
-
A triangular truss structure is shown below. If all truss members are 2.0 m long (a, b, & c in the sketch) and forces L and Rare both 8.0 kN, then what is the force in truss member a? Assume that the...
-
Match each of the following terms with the phrase that best describes it. Quality of earnings........Pro forma income Current ratio ...........Discontinued operations Horizontal analysis...
-
Explain the principles of wording, stating how these are important in questionnaire design, citing examples not in the book.
-
Table B. 24 contains data on home rental prices and home sales. Use all possible regressions to build a model for these data. Perform a residual analysis on the final model and comment on model...
-
Use Newtons method to find the coordinates of the inflection point of the curve y = e cos x, 0, < x < correct to six decimal places.
-
The balance sheet for Carla Vista Co. is as follows: Carla Vista Co. Balance Sheet December 31, 2022 Cash $ 24,000 Accounts payable $ 3,800 Accounts receivable 22,700 Salaries and wages payable 2,800...
-
Determine the force in each member of the roof truss. State if the members are in tension or compression. Assume all members are pin connected. 3 m E- |B |C 10 kN 10 kN 10 kN -4 m-4m-4 m-4 m-
-
A sailboat weighing 980 lb with its occupants is running down wind at 8 mi/h when its spinnaker is raised to increase its speed. Determine the net force provided by the spinnaker over the 10-s...
-
Baggage on the floor of the baggage car of a high-speed train is not prevented from moving other than by friction. The train is travelling down a 5 percent grade when it decreases its speed at a...
-
Neglecting the size of the ball, determine the magnitude v A of the basketballs initial velocity and its velocity when it passes through the basket. 30% A 2 m -10 m- B ww 3 m
-
Carry out an 'environmental scan' of an organization you know well. The following steps should help: (a) Using the PEST framework, the results for one of the organizations chosen for Activity 1.8 and...
-
Imagine the following. You are in the audience of a business plan competition. The next team to present is d.light, a for-profit social enterprise that plans to bring light to people without access...
-
The questionnaire below describes aspects of leadership behaviour. Respond to each item according to the way you would most likely act if you were leader of a work group. Circle whether you would...
-
A team of students participates in a project. The results show that all students are able to finish the project in 7 days. The distribution for the finishing time is given in the following table....
-
A \(0.30-\mathrm{kg}\) solid cylinder is released from rest at the top of a ramp \(1.0 \mathrm{~m}\) long. The cylinder has a radius of \(0.10 \mathrm{~m}\), and the ramps is at an angle of...
-
Consider the following problem presented by Tversky and Kahneman (1983): Linda is 31 years old, single, outspoken, and very bright. She majored in philosophy. As a student, she was deeply concerned...
-
An access route is being constructed across a field (Figure Q8). Apart from a relatively firm strip of ground alongside the field's longer side AB, the ground is generally marshy. The route can...
-
Assume that the speed of sound, c, in a fluid depends on an elastic modulus, Eu, with dimensions FL-2, and the fluid density, p, in the form c = (Ev)a(p)b. If this is to be a dimensionally...
-
Makes use of table 1.3 to express the following quantities in SI units: (a) 10.2 in. /min, (b) 4.81 slugs, (c) 3.02 lb, (d) 73.1ft/s 2 , (e) 0.0234lbs/ft 2 .
-
Make use of table 1.4 to express the following quantities in BG units: (a) 14.2 km, (b) 8.14 N/m 3 , (c) 1.61 kg/m 3 , (d) 0.0320 N m/s (e) 5.67 mm/hr.
-
Write a method (pseudocode) to reverse the queue using another empty queue. You may only use queue operations such as enqueue(), dequeue(), and size(). No other data structure can be used other than...
-
Solve the recurrence relation an = 7an-18an-2-9.2", with initial conditions ao = 5, a = 10. Show all your work.
-
Write an assembly language program that asks the user to enter an integer dollar amount between 1 and 3,000. Your program should display the corresponding class description using the following table....
Study smarter with the SolutionInn App