Question

Calculate the momentum of a truck of mass 25000 kg when
i) it is at rest.
ii) it is moving with a uniform velocity of 90 km/h.

Answer 1

Momentum, p = Mass, m x Velocity, v

p = m x v

(i) m = 25000 kg

v = 0

p = 25000 x 0

p = 0

Momentum = 0 N/m

(ii) m = 25000 kg

v = 90 km/hr = 25 m/s

p = 25000 kg x 25 m/s

p = 625000 N/m

Momentum = 625000 N/m