Momentum+and+Impulse

 Momentum/Impulse WebQuest

Part I: Conservation of Momentum Read [|this tutorial]:

1. A gun with a mass of 5 kg shoots a bullet with a mass of .04 kg. If the bullet leaves the gun with a speed of 250 m/s, what is the speed of recoil of the gun?

Watch the [|Astronaut Catch] :

1. If the first astronaut were moving at 4m/s, and the two astronauts have the same mass, what is their final momentum after they collide? Assume each astronaut has a mass of 100 kg.

Watch the [|cart and brick animation]:

2. What happened to the cart's velocity when the brick was dropped on it?

3. What happened to the total momentum when the brick was dropped?

[|Two-dimensional Momentum] Read the explanation and answer the following questions.

1. What is the difference between an elastic and inelastic collision?

2. A 400-kg car is driving at 20 m/s due east when it collides with a 550-kg car driving at 17 m/s due North. If the two cars experience an inelastic collision, what is their velocity and direction after they collide? What is their total momentum after they collide? Part II: [|Impulse changes momentum] 

1. Where does the impulse equation come from?

2. If a car moving at 20 m/s is brought to a stop in 5 seconds, how much impulse did it feel? How much force is required to bring it to a stop?

3. Would your answers for #2 change if the car were brought to a stop in 2 seconds instead?

4. Based on your answer for #3, is the impulse felt by the car independent of the time it takes to bring the car to a stop?

5. "Happy" and "sad" balls are dropped on the floor at the same time. The happy ball bounces back up, while the sad ball remains on the floor. Which ball exerted more force on the ground?