EP ENGR.MECH.:DYNAMICS-STANDALONE ACC.
14th Edition
ISBN: 9780133976601
Author: HIBBELER
Publisher: PEARSON CO
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Textbook Question
Chapter 18.5, Problem 7RP
If the disk rolls without slipping, determine the velocity of the collar at the instant the rod becomes horizontal, i.e., θ = 0°. The system is released from rest when θ = 45°.
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The system consists of a 19-lb disk A, a 4-lb slender rod BC, and a 3-lb smooth collar C. If the disk rolls without slipping, determine the velocity of the collar at the instant θ = 20°. The system is released from rest when θ = 48°.
The slotted arm OB rotates in a horizontal plane about point O of the fixed circular cam with constant angular velocity 0 = 10rad/s.
The spring has a stiffness of 6.4 kN/m and is uncompressed when 80. The smooth roller A has a mass of 0.36 kg. Determine the
normal force N which the cam exerts on A and also the force R exerted on A by the sides of the slot when 8 52°. The force R is positive
if contact is with the lower surface. All surfaces are smooth. Neglect the small diameter of the roller.
Answers:
N=
R=
0.19
m
0.19
m
B
278.166820949951087 N
N
The spring-mounted 0.89-kg collar A oscillates along the horizontal rod, which is rotating at the constant angular rate θ˙=8.2θ˙=8.2 rad/s. At a certain instant, r is increasing at the rate of 700 mm/s. If the coefficient of kinetic friction between the collar and the rod is 0.63, calculate the friction force F exerted by the rod on the collar at this instant.
Chapter 18 Solutions
EP ENGR.MECH.:DYNAMICS-STANDALONE ACC.
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