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} $