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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Textbook Question
Chapter 5, Problem 14SP
A horizontal essentially weightless lever is pivoted so it can rotate freely in a vertical plane. A downward force of 30.0 N is applied perpendicularly to the lever at a point 25.0 cm from and to the right of the pivot. Determine the torque on the lever, about the pivot. [Hint: Draw a diagram and specify the direction of the torque.]
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Suppose you exert a force of 167 N tangential to a 0.255 m radius 75.0 kg grindstone (a solid disk). (Give your answers to
at least 2 decimal places.)
(a) What torque (in N m) is exerted? (Enter the magnitude.)
42.585
N.m
(b) What is the angular acceleration (in rad/s²) assuming negligible opposing friction? (Enter the magnitude.)
2.44
X rad/s²
(c) What is the angular acceleration (in rad/s²) if there is an opposing frictional force of 22.6 N exerted 1.75 cm from the
axis? (Enter the magnitude.)
rad/s²
Suppose you exert a force of 172 N tangential to a 0.295 m radius 75.0 kg grindstone (a solid disk). (Give your answers to at least 2 decimal places.)
(a) What torque (in N · m) is exerted? (Enter the magnitude.)
50.74
N. m
(b) What is the angular acceleration (in rad/s?) assuming negligible opposing friction? (Enter the magnitude.)
15.55
rad/s?
(c) What is the angular acceleration (in rad/s?) if there is an opposing frictional force of 22.6 N exerted 1.75 cm from the axis? (Enter the magnitude.)
15.44
]× rad/s²
Suppose you exert a force of 192 N tangential to a 0.255 m radius 75.0 kg grindstone (a solid disk). (Give your answers to at
least 2 decimal places.)
(a) What torque (in N· m) is exerted? (Enter the magnitude.)
N. m
(b) What is the angular acceleration (in rad/s?) assuming negligible opposing friction? (Enter the magnitude.)
rad/s2
(c) What is the angular acceleration (in rad/s2) if there is an opposing frictional force of 20.6N exerted 3.00 cm from the axis?
(Enter the magnitude.)
rad/s2
Chapter 5 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 5 - 12. A steering wheel has a diameter of 40.0 cm. A...Ch. 5 - 5.13 [I] A wrench is 50.0 cm long. It is placed on...Ch. 5 -
5.14 [I] A horizontal essentially weightless...Ch. 5 - 5.15 [I] A horizontal essentially weightless lever...Ch. 5 - Prob. 16SPCh. 5 - 17. A force of 1000 N is applied downward at the...Ch. 5 - 5.19 [I] An 800-N painter stands on a uniform...Ch. 5 - 5.20 [II] As depicted in Fig. 5-13, two people sit...Ch. 5 - 5.21 [I] Two people, one at each end of a uniform...Ch. 5 - 5.23 [II] Shown in Fig. 5-14 is a uniform 1600-N...
Ch. 5 - 5.24 [II] The uniform horizontal beam illustrated...Ch. 5 - 25. The arm drawn in Fig. 5-16 supports a 4.0-kg...Ch. 5 - 5.26 [II] The mobile depicted in Fig. 5-17 hangs...Ch. 5 - 5.27 [II] The hinges of a uniform door which...Ch. 5 - 5.28 [III] The uniform bar in Fig. 5-18 weighs 40...Ch. 5 - 5.29 [III] The horizontal, uniform, 120-N board...Ch. 5 - 5.30 [III] The foot of a ladder rests against a...Ch. 5 - 5.31 [III] A truss is made by hinging two uniform,...Ch. 5 - 5.32 [III] A 900-N lawn roller is to be pulled...Ch. 5 - 5.33 [II] In Fig. 5-23, the uniform horizontal...Ch. 5 - 5.34 [III] The beam in Fig. 5-24 has negligible...Ch. 5 - 5.36 [III] An object is subjected to the forces...Ch. 5 - 5.37 [III] The solid uniform disk of radius b...
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