(i) its kinetic energy and
(ii) its momentum.
Solutions:
According to the question –
Mass of cannon ball is 500 g = 0.5 kg
Speed, v is 15 m / s
(a) from the expression of the kinetic energy of ball, we have –
= 1 / 2 × mass × (velocity)2
= 1 / 2× 0.5 × (15)2 = 1 / 2 × 0.5 × 225
Kinetic energy = 56.25J
(b) Momentum of the ball is written as –
P = mass × velocity
= 0.5 × 15 = 7.5 kgm/s