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Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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
Transcribed Image Text:15-103. A 4-lb ball B is traveling around in a circle of
radius r, = 3 ft with a speed (v3), = 6 ft/s. If the attached
cord is pulled down through the hole with a constant speed
v, = 2 ft/s, determine the ball's speed at the instant
n = 2 ft. How much work has to be done to pull down the
cord? Neglect friction and the size of the ball.
Bn = 3 ft
(UB)1 = 6 ft/s
v, = 2 ft/s
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