Question

A body is thrown up with a kinetic energy of 10J. If it attains a maximum height of 5m, find the mass of the body.

Answer 1

Here, kinetic energy of the body, $K.E=10J$Ek=10J
Height attained by the body, $h=5m$
h=5m
When the body attains maximum height, its kinetic energy is converted into potential energy.

$P.E=K.E$

$⟹mgh=10$

$⟹m=\frac{10}{gh}=\frac{10}{10\times 5}=0.2kg$