It is required to increase the velocity of a scooter of mass 80 kg from 5 to 25 m s^-1 in 2 second. Calculate the force required.

Mass = 80 kg
Initial velocity, u = 5 m s^-1
final velocity, v = 25 m s^-1
Time, t = 2 sec

Rate of change of momentum = force applied

Force = = = = 800N