EBK ENGINEERING MECHANICS
15th Edition
ISBN: 9780137616909
Author: HIBBELER
Publisher: VST
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Chapter 17, Problem 7RP
To determine
The angular acceleration of the spool when the couple moment is applied:
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The 186-kg wheel has a radius of gyration about its center O of ko = 300 mm, and
radius r = 0.4 m. When the wheel is subjected to the constant couple moment M =
92 N.m, it starts rolling from rest. Determine the average friction force that the
ground applies to the wheel if it has been rolling without slipping. Please pay
attention: the numbers may change since they are randomized. Your answer must
include 2 places after the decimal point, and proper Sl unit. Take g = 9.81 m/s².
M
Your Answer:
units
Answer
The 30-kg wheel is rolling under the constant moment of M = 99 N-m. The wheel has radius r= 0.45 m, has mass center at point G, and
the radius of gyration is kg = 0.23 m. The coefficients of friction between the wheel and the ground is ls = 0.40 and Hk; = 0.12. If the
wheel rolls without slipping, determine the necessary static frictional force between the wheel and the ground. Please pay attention:
the numbers may change since they are randomized. Your answer must include 2 places after the decimal point, and proper unit. Take g
= 9.81 m/s?.
M
The 200-kg spool has a radius of gyration about
its mass center of kg = 300 mm. If the couple moment is
applied to the spool and the coefficient of kinetic friction
between the spool and the ground is μ = 0.2, determine
the angular acceleration of the spool, the acceleration of G
and the tension in the cable.
0.4 m
B
0.6 m
M = 450 N-m
Chapter 17 Solutions
EBK ENGINEERING MECHANICS
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