Impulse and average force

A ball of mass 0.145kg is kicked by a soccer player. If the player's foot is in contact with the ball for 0.01sec and gives it a speed of 40m/sec, find the impulse and average force on the ball during the kick.

Stopping force

How long does it take to stop a 3X10-5kg mass moving at 2X104m/sec by applying a stopping force of 12N on this mass?

Average force

A 3000kg truck crashes into a wall at 40km/hr and comes to a stop in 0.5sec. What is the average force on the truck while it comes to a stop?

Magnitude and direction

A 30kg girl moving with speed 2m/sec and a 50kg boy moving with speed 1m/sec collide head-on on an ice-skating rink. As a result of the collision, the girl moves at 1m/sec opposite to her initial direction. Find the magnitude and direction of the boy's velocity after the collision.

Momentum, velocity, KE

A 0.4kg ball moving with speed of 3m/sec collides with a 0.6kg mass initially at rest. If the two particles stick together during the collision, find the momentum, velocity, and kinectic energy of the system after the collision.