Question

Two bodies of equal weight are kept at heights of h and 1.5h respectively. The ratio of their P.E. is_____

• A. 3 : 2
• B. 2 : 3
• C. 1 : 1
• D. none of these

Answer 1

Answer: (B)

2 : 3

Potential energy of the body when raised upto some height h against gravity is given by mgh. i.e. work done against gravitational force to raise the body to that height will be $mg\times h$.

Assuming ground surface as refrence level.

Potential energy for body at h is mgh

And potential energy for the body at 1.5h is 1.5mgh.

Ratio of both is 2:3.

So best possible answer is option B.