Solution:

Here, the mass of the stone (m) = 0.5 kg,

velocity at which it is thrown (v) = 5 m/s,

The kinetic energy of the stone (KE) =?

We have,

Kinetic energy of the stone (KE) = \(\frac12mv^2\)

= \(\frac120.5\times5^2\)

= 6.25 Joules

Hence, the kinetic energy of the stone (KE) is 6.25 joules