A body falling freely from a height of 10 m hits a floor. If it loses 20% of its energy during impact, it
again rises to a height of
(A) 8 m
(B) 6 m
(C) 4 m
(D) 2 m
Answers
Answered by
2
Answer:
Option(A) - 8 m
Explanation:
Given,
height = 10 m, g = 10 m/s,
Potential energy = mgh
= m * 10 * 10
= 100 m.
It loses 20% of its energy during impact.
= 20% of 100
= 20 m
Then,
Energy left on striking the ground = 100 m - 20 m
= 80 m J
It means, final energy = 80 m J.
Thus,
h = (80/10) = 8 m
Therefore,
It raises to a height of 8 m.
Hope it helps! Mark As Brainliest!
Similar questions