Momentum and Impulse Review

How much momentum does a 4,500 kg elephant running at 10 meters/second have?

• 45,000 kg*m/s

• 450 kg*m/s

• 4,510 kg*m/s

• 4,490 kg*m/s

A cart is moving with a momentum of 3 kg*m/s. A force is applied to the cart, causing an impulse of 2 kg*m/s. What will be its new momentum after the force is applied?

• 1 kg*m/s

• 2 kg*m/s

• 3 kg*m/s

• 5 kg*m/s

A kindergartener is playing T-ball. Their bat collides with the ball with an average force of 500 N for a time of 0.02 seconds. What impulse is delivered to the ball?

• 500 N*s

• 10 N*s

• 25,000 N*s

• 0.02 N*s

How could you cause the following situation to occur?

• Add mass to Cart A

• Add mass to Cart B

• Do not add mass to either cart

• It is impossible. There is no way to cause this situation to occur.

Person A and Person B are standing on very slippery ice, right next to each other. Person A has a larger mass than Person B. They push off each other, causing each person to move backwards. After the push, which person has the largest momentum? Which person has the largest speed?

• Largest Momentum: A

  Largest Speed: A

• Largest Momentum: Same

  Largest Speed: B

• Largest Momentum: Same

  Largest Speed: B

• Largest Momentum: A

  Largest Speed: B

A car collides with a flying mosquito. Splat! Which of the following statements about the collision forces is true?

• The force from the car on the mosquito is bigger than the force from the mosquito on the car

• The force from the car on the mosquito is smaller than the force from the mosquito on the car

• The force from the car on the mosquito is equal to the force from the mosquito on the car

• You need more information to compare the forces

In the diagram below, what is the momentum of the car after the collision?

• 6000 kg*m/s

• 2000 kg*m/s

• 5000 kg*m/s

• 0 kg*m/s

A student is taking part in an egg drop competition, where they drop an egg from the second floor of a building onto the ground. They are trying to reduce the collision force on the egg. The student has the idea of adding a parachute to their egg in order to reduce the collision force. Why will this work?

• It will decrease the velocity change, which will decrease the collision force

• It will increase the velocity change, which will decrease the collision force

• It will increase the collision time, which will decrease the collision force

• It will decrease the collision time, which will decrease the collision force

A student drops a hard ball onto a hard floor. A graph of the force from the floor as a function of time is shown below. The student now drops the same ball onto a cushioned floor. Which of the following could be a graph of the new cushioned force from the floor vs. time?

• 
• 
• 
• 

What number could go in place of the ★?

• 0

• A number less than 0.21 seconds

• 0.21 seconds

• A number greater than 0.21 seconds