COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 4, Problem 81QAP
To determine
(a)
The tension in the rope.
To determine
(b)
The mass of the box A.
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The blocks shown below are connected by cords passing over frictionless pulleys. The coefficients of friction between block A and the ground surface are µs=0.40 and µk= 0.30. Determine the direction of motion (to the left or to the right) of both blocks if it will occur, and compute the magnitude of the actual friction force in kN acting on each block.
Body A in the figure weighs 96 N, and body B weighs 16 N. The coefficients of friction between A and the incline are u, = 0.59 and uk =
0.25. Angle 0 is 28°. Let the
positive direction of an x axis be up the incline. What is the acceleration of A if A is initially (a) at rest, (b) moving up the incline, and (c)
moving down the incline?
Frictionless,
massless pulley
(a) Number
i
Units
(b) Number
-4.39
Units
m/s^2
(c) Number
i
Units
m/s^2
Two blocks are connected via a pulley, both blocks have a mass of 10.kg. One block rests on a horizontal surface and the other one hangs freely by a cord which passes over a pulley. Assume the cord does not stretch, ignore mass of pulley and cord, therefore acceleration is the same for both blocks and tension is the same for both blocks. The hanging block moves down so the block lying on the horizontal surface moves to the right.
What is the acceleration (m/s^2) of the blocks if the coefficient of friction between the block and the surface is 0.50.
Chapter 4 Solutions
COLLEGE PHYSICS
Ch. 4 - Prob. 1QAPCh. 4 - Prob. 2QAPCh. 4 - Prob. 3QAPCh. 4 - Prob. 4QAPCh. 4 - Prob. 5QAPCh. 4 - Prob. 6QAPCh. 4 - Prob. 7QAPCh. 4 - Prob. 8QAPCh. 4 - Prob. 9QAPCh. 4 - Prob. 10QAP
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