Q.

A bicycle chain of length 1.6 m and of mass 1 kg is lying on a horizontal floor. If g=10ms-2, the work done in lifting it with one end touching the floor and the other end 1.6 m above the floor is

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a

10 J

b

3.2 J

c

8 J

d

16 J

answer is C.

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Detailed Solution

W=F→.S→=FS cosθ ;  here F=mg; S=l2, θ=0o
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