Question

A ball is dropped from a height of 4.2 metres. To what height will it rise if there is no loss of KE after rebounding?

Answer 1

Answer:

4.2m

Explanation:

There is no loss of energy.

All of its potential energy would be converted to K.E.

Since there is no loss of energy , all of its K.E. would get converted to P.E. again and hence both P.E. ( before dropping and after rebounding) would be equal giving equal height.

P.E.(initial)= P.E. (final)

mgh = mgH

h = H = 4.2 m