Question

An object is dropped from a height of 10m. If the energy is reduced by 40% after it strikes the ground, how high can it bounce back?

please help me​

Answer 1

Now 40% of the energy lost means 40% of the height also lost on bouncing back. Given height is 10m and when you lose 40% of 10m, left will be 60% of 10m. The height of the bounce back is hence 60% of 10m which 6m