Question

If the energy of a ball falling from a
height of 10 metres is reduced by
40%, how high will it rebound?​

Answer 1

Answer:

It will not rebound because gravitational force attract the ball

Answer 2

Answer:

6 meters

Explanation:

Ratio of Energy  and Energy 1 is 10:6 (because energy reduced by 40%)

Energy   = mgh

Energy 1 = $mgh_{1}$ (New energy after 40% reduced)

$\frac{energy 1}{energy} = \frac{6}{10}$

∴ $\frac{h1}{h} = 0.6$

∴ $\frac{h1}{10} = 0.6$

∴ h1 = 6 meters