Chapter 13, Problem 16P

A hand pushes horizontally with a constant force on two blocks stacked against a wall (u, between finger and block A is zero). The blocks and wall do not accelerate. The mass of block A is greater than that of block B. The coefficient of static friction between the block and wall is the same as the coefficient of static friction between the two blocks. Draw a separate free-body diagram for each block. For each force on your free-body diagrams, be sure to indicate: • the type of force (e.g., tension, weight ...), • the object on which the force is exerted, and • the object exerting the force. a. Rank the magnitudes of the vertical forces that you have shown from largest to smallest. Explain how you applied Newton's second and third laws to obtain your answer. b. Suppose the hand pushes horizontally with a constant force that is twice as large as in part a. Would the friction force exerted by the wall be greater than, less than, or equal to the friction force by the wall in part a?…

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Two blocks are joined by an inextensible cable as shown. The mass of block A is 197.3 kg and the mass of block B is 257.1 kg. If the system is released from rest, determine the acceleration (in m/s? ) of block B. Assume that the coefficient of friction between block A and the plane is uk = 0.25 and that the pulley is weightless and frictionless. Round off only on the final answer expressed in 3 decimal places. Use g = 9.81 m/s? blocks.png ... A В

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A 100kg block slid down from a 30° incline. It traveled, from rest, down to 10 meters along the incline. If it took the block to travel that far in 1s, determine the reverse effective force if coefficient of friction is 0.2KINDLY ANSWER WITH COMPLETE SOLUTION PLS

A large shipping crate is at rest on the horizontal floor of a warehouse. The coefficient of static friction between the crate and the floor is μs = 0.500; the coefficient of kinetic friction is μk = 0.300. Assume that the estimation of the weight of the heaviest crate you could start sliding by pushing on it horizontally is about 100 lb. The magnitude of the maximum force can apply is 220N. With the same force, how far would the crate travel before reaching a speed of 8.0 m/s? Use the work-energy theorem.

The block has a mass of 140 kg and rests on a surface for which the coefficients of static and kinetic friction are Hs = 0.5 and uj. = 0.4, respectively. (Figure 1) Part A If a force F = (60t2 ) N, where t is in seconds, is applied to the cable, determine the power developed by the force when t = 5 s. Hint: First determine the time needed for the force to cause motion. Express your answer to three significant figures and include the appropriate units. µA ? P = Value Units Figure 1 of 1 Submit Request Answer Provide Feedback Next >

Problem 4: This box is placed on a turntable at a distance r = 4.2 meters from the center axis. The turntable is originally at rest. At time t = 0, the turntable begins to rotate at a constant angular acceleration of 0.2 rad/s². Find the time at which the box begins to slip if the static coefficient of friction between the box and the platform is 0.58. r

A man is pushing a refrigerator initially at rest up a 20 degree incline. He pushes with a force of 90 N parallel to the incline. The weight of the refrigerator is 80 N. The coefficient of non-sliding and sliding friction is 0.4 and 0.3 respectively. Point A is designated to be the lower right corner of the refrigerator.  For what value of P will the refrigerator start to slide upwards? For what value of P will the refrigerator start to tip forward? What is the state of motion of the refrigerator?