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Q.

A force F acts tangentially at the highest point of a disc of mass m kept on a rough horizontal plane. If the disc rolls without slipping, the acceleration of centre of the disc is:

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a

2F3m

b

10F7m

c

zero

d

4F3m

answer is D.

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Detailed Solution

F+f=ma                  ......(i)FR−fR=mR22aR  ......(ii)F−f=ma2                 ........(iii)2F=3ma2⇒a=4F3m
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