Question

A ball falls under gravity from a height of 10 m with an initial downward velocity v not It collides with ground, loses 50% of energy in collision and then rises back to the same height. Find the initial velocity V not .​

Answer 1

Answer:

So, by principle of conservation of energy: 50% loss in kinetic energy at the time of collision is equal to 50% loss in total energy. Therefore, the energy required to move to the same height, that is, mgh should be equal to half the total energy. Hence, the initial downward velocity comes out to be 14ms−1 .

Answer 2

v एग्जांपल tho एग्जांपल its