Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 4, Problem 20SP
In Fig. 4-10, the pulleys are frictionless and weightless and the system hangs in equilibrium. If
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A 260 N block is placed on a 3:4 [V: H] inclined plane. A 95 N force parallel to the incline acts up on the block. The coefficients of static and kinetic friction between the block and the plane are 0.25 & 0.2 respectively. Compute the value of the frictional force [F].
The coefficient of kinetic friction between a box and the floor is u, = 0.16 and the coefficient of static friction is u, = 2.0µ.
(a) Calculate the ratio of static to kinetic friction force if m = 9 kg.
(b) Will the ratio change if the value of m is changed but u, still equals 2.0µ?
Yes
No
A rope exerts a force of 50 N on a box to keep it stationary. If the box is on a plane inclined 25° from the horizontal and the coefficient of static friction is 0.29, calculate the normal force exerted on the box.
Chapter 4 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 4 - 4.9 [I] A person stands on a scale, which then...Ch. 4 - 4.10 [I] Two evenly matched teams of youngsters...Ch. 4 - 4.11 [I] A rope is tied to a hook fastened to a...Ch. 4 - 4.12 [I] An essentially weightless pulley that is...Ch. 4 - 4.13 [I] An essentially weightless rope is slung...Ch. 4 - 4.14 [I] An essentially weightless rope is slung...Ch. 4 - 4.15 [I] A 2.00-kg block rests on a frictionless...Ch. 4 - 4.16 [I] The load in Fig. 4-7 is hanging at rest....Ch. 4 - 4.17 [I] (a) A 600-N load hangs motionlessly in...Ch. 4 - 4.18 [I] For the situation shown in Fig. 4-9, find...
Ch. 4 - 19. The following coplanar forces pull on a ring:...Ch. 4 - 4.20 [II] In Fig. 4-10, the pulleys are...Ch. 4 - 4.21 [II] Suppose in Fig. 4-10 is 500 N. Find the...Ch. 4 - 4.22 [I] If in Fig. 4-11 the friction between the...Ch. 4 - 4.23 [II] The system in Fig. 4-11 remains at rest...Ch. 4 - 24. Find the normal force acting on the block in...Ch. 4 - 25. The block depicted Fig. 4-12(a) slides with...Ch. 4 - 26. The block shown in Fig. 4-12(b) slides at a...Ch. 4 - 27. The block in Fig. 4-12(c) just begins to slide...Ch. 4 - 4.28 [II] If in the equilibrium situation shown...Ch. 4 -
29. Refer to the equilibrium situation shown in...Ch. 4 - 4.30 [III] The hanging object in Fig. 4-14 is in...Ch. 4 - 31. The pulleys shown in Fig. 4-15 have negligible...Ch. 4 - 4.32 [III] In Fig. 4-16, the system is at rest....Ch. 4 - 4.33 [III] The block in Fig. 4-16 is just on the...
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- A handtruck/dolly is being pulled up a board-ramp inclined 32° with dollyload combined weight of 296 pounds (operator of the dolly not included). It is known that the board has a maximum load carrying capacity of 242 pounds at its center (weakest point) when horizontal. Round answers to 4 decimal places. Forced pointing down are negative. W2 2 32 wi ngs |w = 296 lb a) What is the component of the weight of the dolly perpendicular to the ramp (w1)? pounds b) What is the component of the weight of the dolly parallel to the ramp (w2)? w2 = pounds c) Will the board/ramp break? d) What force is required to pull the dolly up the ramp?arrow_forwardA 5.740 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is u, = 0.555 and the coefficient of kinetic friction is µy = 0.305. At time t = 0, a force F = 19.2 N is applied F horizontally to the block. State the force of friction applied to the block by Us,k the table at times t = 0 and t > 0. t = 0 t > 0 N Consider the same situation, but this time the external force F is 38.8 N. Again, state the force of friction acting on the block at times t = 0 and t > 0. %3D t = 0 t > 0 Narrow_forwardA crate is pushed across a horizontal surface by the applied force shown in the figure. The magnitude of the force F = 24.1 N, 0 = 27.9°, the coefficient of kinetic friction between the block and the surface is 0.4, and M = 2.49 kg, what is the magnitude of the acceleration of the crate in m/s?arrow_forward
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