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Q.

A force of magnitude F are acting on a uniform disc kept on a horizontal rough surface as shown in figure . The frictional force on the disk by horizontal surface ( in Newton) is ( mass of the disk is 0.25 kg, radius of the disk = 10 cm)

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Detailed Solution

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2F-f =ma ....(1)

F+f r=12mr2α .....(2)

 a=rα .... (3)

from (1), (2) and (3),

f=0

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