COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 40QAP
To determine
To draw:
A free body diagram for an object of mass M rests on a ramp.
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1 Figure 5-19 gives the free-body diagram for four situations in which an object is pulled by several forces across
a frictionless floor, as seen from overhead. In which situations does the acceleration a of the object have (a) an
x component and (b) a y component? (c) In each situation, give the direction of a by naming either a quadrant
or a direction along an axis. (Don't reach for the calculator because this can be answered with a few mental
calculat
s.)
A7N
46N
46 N
3 N
3 N
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3 N
2 N
3 N
5 N
2 N
5 N
2NV
4N
5 N
v4 N
,3N
4 N
,4N
5 N
V4 N
(1)
(2)
(3)
(4)
Problem 3
A 4-kg block rests on a horizontal surface. The block is
pulled by 20 N force acting 25° above the horizontal but
not enough to move the block. Calculate the following:
(a) the friction force between the surface and the block.
(b) the normal force on the block.
(c) the coefficient of static friction.
2 blocks ml and m2 are connected by a rope and are initially laid at rest on a 30-degree incline plane.
The plane surface has coefficients of static and kinetic friction at 0.20 and 0,18 respectively for all
surfaces. A force 75N paralel to the inclined is applied to prevent the blocks from sliding. (a) Determine
the masses of the blocks if m2 is twice as heavy as ml. (b) what value of force (paralel to the inclined)
is required to stop the blocks if they were accelerating at 1.2m/s/s?
Chapter 5 Solutions
COLLEGE PHYSICS
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- 4-5. Rollers A and B each weigh 200 N (Figure P4-5). Assume smooth surfaces and draw a free-body diagram of roller A. FIGURE P4-5 70⁰ 45%arrow_forward2. ) Two blocks of masses m, = m2 = 1.0 kg are at rest on the inclined plane as shown in the figure. Both blocks are made up of different materials such that the coefficient of 3.0 kg and m2 m1 static friction between the surfaces of block m, and incline plane is 0.7, while the coefficient of static friction between the surfaces of block m, and incline plane is 0.5. Answer the following questions. 30° a. Draw a free-body force diagram for the mass m (Remember: the free-body force diagram should be drawn without the body and on XY coordinate axes, where the positive X-axis is downward along the inclined plane)(Show all forces and level the name of the forces clearly) b. Write down Newton's second Law for mass m, along X-axis (Hint: Simply expand the summation in the equation EF, = m,a to include all forces. No calculation is required) С. Find the maximum possible static friction force on mass m.. d. Determine the magnitude of the interaction force between blocks m, and m2. (show all…arrow_forwardPart 2) A block with a mass of m = 0.410 kg is placed on a plane that can be tilted, as shown below. The coefficient of static friction between the block and the plane is 4, = 0.350, while the coefficient of kinetic friction between the block and the plane is Hk = 0.270. The angle between the inclined plane and the block is slowly increased. No additional force is applied to the block. m At what angle will the block start to slide down the plane? Part 3) If the plane is at the angle you calculated in Part 2, what will be the acceleration of the block down the plane? a = m/s? down the planearrow_forward
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