A train moves from rest to a speed of 30 m/s in 32.0 seconds. What is its acceleration?

0.94m/s (squared)

Explanation:

a=change in velocity/time

a=v-u/t

a=32-0=32/32

a=0.94m/s (squared)

21750 kg m/s

Explanation:

Momentum of a body is the product of its mass and velocity. Momentum is a vector quantity. The rate of change of momentum gives the net force. Momentum for more than one particle is given by

m = Mass of car = 725 kg

v = Velocity of car = 30 m/s

Momentum for a single object

p = m×v

⇒p = 725×30

⇒p = 21750 kg m/s

∴ The momentum of the compact car is 21750 kg m/s