Question

if weight of object on earth is 29.4 n and when we release this object is from 20m height .what is its kinetic energy at the time of collision with moon surface

Answer 1

Weight on Earth$=29.4N$

So mass of object$=\frac{29.4}{9.8}=3Kg$

Potential energy on moon$=3\times1.62\times20=97.2J$

Whole potential energy is converted into the kinetic energy when the object collides with the surface of moon.

Hence kinetic energy at the time of collision$=97.2J$