momentum exercise

A rocket weighing 4.36 * 10^4 N, has an engine that provides an upward force of 8.9 * 10^5 N. It reaches a max of 860 m/s Force diagram? How long must the engine burn in order to reach this speed?

Collisions

A tennis player returnsa 30 m/s serve back at 25 m/s after making contact with the ball for .5 seconds. If the ball has a mass of 0.2 kg, what is the force she exerted on the ball?

Momentum of dropped ball

A golf ball weighs .45 N is dropped from height 1 meter. Perfect ellastic collsion with floor. What is time required to hit floor? What is the instantaneous momentum of ball before it strikes the floor? What will be the change in momentum from the instant before it hits the ground to right after it rebounds? If it was in contact wiht floor for 4 X 10^-4 seconds then what wast he average force on the ball while on the ground?

Ball dropped

A golf ball weighs .45 N is dropped from height 1 meter. Perfect ellastic collsion with floor. What is time required to hit floor? What is the instantaneous momentum of ball before it strikes the floor? What will be the change in momentum from the instant before it hits the ground to right after it rebounds? If it was in contact wiht floor for 4 X 10^-4 seconds then what wast he average force on the ball while on the ground?

Collisions

Miguel has a mass of 100 kg and is running toward end-zone at 9 m/s. Gonzales mass of 75 kg runs at Miguel at 12 m/s. They collide at two year line. Does Miguel score? Explain using momentum or collsion.