posted by Shazra .
A force was applied on a mass of 2kg moving at velocity of 5m/s. If the velocity changed to 20m/s in 4s find the change in momentum and the force
Change in momentum = 2.0 kg*(20 - 5) m/s
= 30 kg*m/s
Force * Time = Change in momentum
Force = (30 kg*m/s)/(4.0 s)
= 7.5 Newtons