Two people push a car for 3 S with a combined net force of 200 N.
If the car has a mass of 1200 kg, what will be its change in velocity?

Calculate the time needed for a net force of 5 N to change the velcoity of a 10 kg mass by 2 m/s .

Two spacemen A and B are floating is gravity free space with zero velocity relative to each other. "A" has a mass of 120 kg and "B" has a mass of 90kg which includes a 5 kg radio box. "B" throws the box towards "A" with a velocity of 2m/x and A catches it. The change in velocity of each one is