Essential University Physics: Volume 1 (3rd Edition)
3rd Edition
ISBN: 9780321993724
Author: Richard Wolfson
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 50P
A bug crawls outward from the center of a CD spinning at 200 revolutions per minute. The coefficient of static friction between the bug’s sticky feet and the disc surface is 1.2. How far does the bug get from the center before slipping?
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A particle of dust lands 41.4 mm from the center of a compact disc (CD) that is 120 mmin diameter. The CD speeds up from rest, and the dust particle is ejected when the CD is rotating at 82.0 revolutions per minute. What is the coefficient of static friction between the particle and the surface of the CD?
A car is driving on a flat, circular track and accelerates uniformly from rest with a tangential acceleration aT = 1.6 m/s^2 . The car makes it one-quarter of the way around the circle and then skids off the track. What is the coefficient of static friction between the car and the track?
A skateboarder is attempting to make a circular arc of radius r = 16 m in a parking lot. The total mass of the skateboard and skateboarder is m = 91 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.69 .
a)What is the maximum speed, in meters per second, he can travel through the arc without slipping?
b) He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.24. What is the new magnitude of his radial acceleration in m/s2?
Chapter 5 Solutions
Essential University Physics: Volume 1 (3rd Edition)
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