A yo-yo is made of three disks, as shown : two outer disks of mass M =
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Question:
A yo-yo is made of three disks, as shown : two outer disks of mass M = 40 g, radius R = 3.0 cm, and thickness d = 1.2 cm, sandwiched around an inner disk of mass m = 20 g, radius r = 1.5 cm, and the same thickness d = 1.2 cm. A string is wrapped around the inner disk. The free end is attached to a ceiling, and then the yo-yo is released from rest.
a) What is the tension in the string as the yo-yo falls? What fraction of the yo-yo's weight is this?
b) What is the yo-yo's linear speed when it has fallen a distance of H = 0.5 m? How does this compare to what the speed would be if it fell with no string attached?
Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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