A cylindrical drum is pushed along by a board of length l. The drum rolls forward on the ground a distance of l2 . There is no slipping at any instant. During the process of pushing the board, the distance moved by the man on the ground is:
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a
l2
b
3l4
c
I
d
none of these
answer is C.
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Detailed Solution
As velocity of topmost point = 2vSo, the distance moved by the man on the ground =2l2=l