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 19SP
The following coplanar forces pull on a ring: 200 N at 30.0°, 500 N at 80.0°, 300 N at 240°, and an unknown force. Find the magnitude and direction of the unknown force if the ring is in equilibrium.
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A uniform plank of length 2.00 m and mass 34.0 kg is supported by three ropes, as indicated by the blue vectors in the figure below. Find the tension in each rope when a 695-N person is d = 0.500 m from the left end.
magnitude of
N
magnitude of T
N
magnitude of
N
T₂4
7,44
2.00 m
T.
40.0⁰
Q
A 3·a long straight rod (a = 0.8 m) is marked with four equally separated points: A, B, C, and D (points A and D are on the opposite ends of the rod). There are three external forces exerted on the rod: force F1 = 20.5 N is applied at point C perpendicular to the rod, force F2 = 23.5 N is applied at point D at an angle of θ = 34° relative to the rod's normal, and force F3 = 20.5 N is applied at point D parallel to the rod. Find the magnitude and direction of the torques produced by these forces relative to the points indicated below.
The torque due to F1 relative to point A, τA(due to F1)
The torque due to F1 relative to point B, τB(due to F1)
The torque due to F1 relative to point C, τC(due to F1)
The torque due to F1 relative to point D, τD(due to F1)
The torque due to F2 relative to point A, τA(due to F2)
The torque due to F3 relative to point A, τA(due to F3)
The two structural members, one of which is in tension and the other in compression, exert the indicated forces on joint O. Determine the magnitude of the resultant R of the two forces and the angle
e which R makes with the positive x-axis. The angle e is measured counterclockwise from the positive x-axis.
4.7 kN
2.2 kN
21°
56
Answers:
R =
kN
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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