Question

if a body falls from height of 10m vertically in gravity where acceleration is 10m/s square ,find how much velocity it will get it the ground point​

Answer 1

Explanation:

Initial total energy at height h is, =21mu2+mgh

Energy of ball after collision, 

                                    =50% of total energy.

As ball rebounds to same height h, then

mgh= 50% 0f total energy.

         =41mu2+21mgh

therefore,                u=sqrt(2gh)=14m/s