Physics Elasticity Question 49

Question: Calculate the work done, if a wire is loaded by ‘Mg’ weight and the increase in length is ’l’

[CPMT 1999; DCE 1999, 2001; Pb. PET 2000, 01]

Options:

A) Mgl

B) Zero

C) Mgl/2

D) 2Mgl

Show Answer

Answer:

Correct Answer: C

Solution:

Work done = $ \frac{1}{2}Fl=\frac{Mgl}{2} $