Consider a 
uniform circular disk of radius 
. It is pin supported at its center and is at rest initially.The disk is acted upon by a constant force 
through a massless string wrapped around its peripheryas shown in the figure.
Suppose the disk makes 
number of revolutions to attain an angular speed of 
. The value of 
, to thenearest integer, is____ [Given: In one complete revolution, the disk rotates by 
]
Text Solution
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20 JEE Main 2021
No. of 
revolution
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