COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 50QAP
To determine
The mass of the hanging block 1.
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3.- A truck tows a 400 kg log from a ditch by means of a winch attached to its rear part. Knowing that the winch applies a constant force F and the coefficient of kinetic friction between the ground and the log is 0.5, determine the force F if the log reaches a speed of 0.5 m / s in 1.8 s. Visual representation (Make drawings or diagrams, clearly indicate the vectors and variables involved in the problem, it can be on the drawing)
A 4.0-kg square block is on an incline plane of 30 degrees angle with respect to the ground.
1)What is the minimum coefficient of static friction (μs)min is need to prevent it from sliding down the incline?
2) When the surface μs is 0.30 to prevent the block sliding, a horizontal force F, parallel to the ground, is applied to the block. find the minimum magnitude of F required to keep the block from moving.
3) When a 20 N uphill force is applied to the block, the block starts to move up along the incline. Find the acceleration of the block
A 10-lb block B rests as shown on a 20-lb bracket A. The coefficients of friction are μs= 0.30 and uk = 0.25 between block B and bracket A , and there is no friction in the pulley or between the bracket and the horizontal surface. (a) Determine the maximum weight of block C if block B is not to slide on bracket A.(b) If the weight of block C is 10 percent larger than the answer found in a, determine the accelerations of A, B, and C.
Chapter 5 Solutions
COLLEGE PHYSICS
Ch. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAPCh. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAP
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- A working boy pushes a 15kg lawnmower at a constant speed with force of 90.0N directed along the handle which is at an angle of 30° below horizontal. a.) calculate the friction force the boy is overcoming . b.) calculate the lower reaction force on the mower from the ground. c.) calculate the coefficient of friction between the mower wheels on the ground. d.) calculate how hard the boy would have to push on the handle to give the mower acceleration of 0.80 m/s^2.arrow_forward10. The two blocks are attached to each other by a massless string that is wrapped around a frictionless pulley. When the bottom 9.00-kg block is pulled to the left by the constant force P. The top 6.00-kg block slides across it to the right. Find the magnitude of the force necessary to move the blocks at constant speed. Assume that the coefficient of kinetic friction between all surfaces is 0.700.arrow_forward8 - I. The effect that makes the movement of objects difficult is called friction force.II. The friction force is in the opposite direction to the motion.III. The friction force depends on the characteristics of the friction surface.IV. Friction force is inversely proportional to reaction force.Which of the following are / are the correct statements regarding the friction force? A) I-II-IIIB) II-III-IVC) II-IIID) I-II-III-IVE) I-III-IVarrow_forward
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