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 wa ...continues

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 ...continues

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.

Jumping off a raft

A raft of mass 180kg carries two swimmers of 50 kg and 80 kg. Raft initially at rest but swimmers dive off opposite ends each at 3 m/s. With what velocity and in what direction does to raft start to move?

Impulse concepts

Discuss the following in terms of impulse and momentum: Why are padded dashboards safer in cars? Why are nylon ropes, which stretch under stress, favored by mountainclimbers? Why is it preferrred that railroad cars be loosely coupled with slack between cars?

Momentum concepts

Why is it difficult for a fire-fighter to hold a hose that ejects large amounts of water at high speed? If an 18-wheeler hit Geo (small car) at equal speeds in a head-on collision: Which vehicle will experience the greatest ... force of impact? change in momentum? acceleration? A billiard ball will stop when it collid ...continues

Need experiment to demonstrate how fluids move from areas of high pressure to low pressure

I need an experiment to demonstrate how fluids move from areas of high pressure to low pressure. My teacher has given examples, but I can't use any of hers. I've been working for days and am stuck and under the gun.

How to implode a 44 gallon drum

I am doing a low budget film shoot in australia that requires ( as a comedy skit) a 44 gallon drum to imlode. I need to find a safe way to do this. There are no requirements for any actors to be close to the drum. I need to know how to achieve this effect, cheaply and safely. anyone out there with a solution?