Question

MC)10J
(d)19.63
A rubber ball dropped from 4 m height
loses its potential energy by 25%. What
is the height to which it rebounds?
(a) 3m
(b)12m
(C) 18m
(d)24m
-Two bodies A and B having masses n​

Answer 1

Explanation:

hey see only the first option is less than 4m while others are greater than the provided height and as the energy is lost thus it is obvious that the rebound heieht will be less than that which us 3m.

for calculation:

potential energy left=75%mgh

ie

75%mg×4=mgh1

therefore

h1=3m