Discussion Forum : Work Power And Energy
Question -


A moving railway compartment has a spring of constant k fixed to its front wall. A boy stretches this spring by distance x and in the mean time the compartment moves by a distance s. The work done by boy w.r.t. earth is
A Moving Railway Compartment Has A Spring Of Constant K Fixe...

Options:
A .   12kx2
B .   12(kx)(s+x)
C .   12kxs
D .   12kx(s+x+s)
Answer: Option A
:
A

Total work done is equal to the energy stored in the spring.



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