(i) the kinetic energy and

(ii) the speed of the body.

Solutions:

According to the question –

Mass of body is 60 kg

Momentum is p = 3000 kgm / s

(a) using the expression of kinetic energy, we have

KE  = p² / 2m

= (3000)² / 2 × 60 = (3000 × 3000) / 120

= 75000J

Therefore, KE = 7.5 × 10⁴J

(b) Now, for Momentum , we have –

P = mass × velocity

3000 = 60 × velocity

Or, Velocity = 3000 / 60

Velocity = 50 m / s