Question

Calculate the kinetic energy of a body of mass 5 kg and momentum 50 kgms⁻¹.

Answer 1

Using \[ \text{K.E.} = \frac{p^{2}}{2m} \]

where p = 50 kgms⁻¹ and m = 5 kg:

\[ \text{K.E.} = \frac{(50)^{2}}{2\, (5)} \]

\[= \frac{2500}{10} \]

= 250 J

Therefore, the kinetic energy is 250 J.