Spring of constant k fixed to its front wall. A body stretches this spring by distance x and in the mean time the compartment moves by a distance s. The work done by boy with reference to earth is
A
kx 2
B
(kx) (s + x)
C
kxs
D
kx(s + x + s)
Text Solution
Verified by ExpertsThe correct answer is:
A
Work done by man to stretch the spring = 
Work done by man on the floor = 
∴ ∴ Total work done = 
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