Question

Calculate the momentum of the following :
(a) an elephant of mass 2000 kg moving at 5 m/s
(b) a bullet of mass 0.02 kg moving at 400 m/s

Answer 1

(a) We know that:
Momentum = mass × velocity
                   = m × v
Here, mass, m = 2000 kg
velocity, v = 5 m/s
Putting these values in the above formula, we get:
Momentum = 2000 × 5 kg.m/s = 10000 kg.m/s

(b) We know that:
Momentum = mass × velocity
                   = m × v
Here, mass, m = 0.02 kg
And, velocity, v = 400 m/s
Putting these values in the above formula, we get:
Momentum = 0.02 × 400 kg.m/s = 8 kg.m/s