physics
posted by Joceylin .
1) a force of 10 N acts on a 5.0 kg object, initially at rest, for 2.5 s. What is the final speed of the object?
2) a 1500 kh car, is allowed to coast along a level track at a speed of 8.0 m/s. It collides and couples with a 2000kg truck , initially at rest with brakes released. What is the speed of the two vehicles after they collide?
3) a 0.060 tennis ball, initially moving at a speed of 12 m/s, is struck, which causes it to rebound in the opposite direction at a speed of 18 m/s. What is the change in momentum of the ball?
4) a 0.35 jk mud ball is dropped from a height of 2.5 m above a floor. When it hits the floor, the mud ball comes to rest in 0.30 s. What is the magnitude if the average force on the mud ball by the floor?

Hmm. Four momentum problems; no effort or thought shown.
Someone will be glad to critique your work.