Exit Check 4.3 - Conservation of Momentum

4.3.1

Use the picture to identify the momenta of both objects. Then match the information below with correct descriptions.

• Total momentum before collision

• Momentum of the larger ball before collision

• Momentum of the smaller ball before collision

Answer explanation

This question links to success criteria 4.3.1: I can determine the individual and total momenta values before and after a collision.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.1

Oliver is working on his momentum lab. He has calculated that the total momentum in his system is 0.15 kg⋅m/s after the collision. If the second ball was not moving before the collision what was the momentum of the first ball before the collision?

• 0.15 kg⋅m/s

• - 0.30 kg⋅m/s

• 0.85 kg⋅m/s

• 0.00 kg⋅m/s

Answer explanation

This question links to success criteria 4.3.1: I can determine the individual and total momenta values before and after a collision.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.1

A toy truck moves East with a momentum of 50 kg⋅m/s. It collides toy car moving West with a momentum of 50 kg⋅m/s. What is the total momentum of the system?

• 0 kg·m/s

• 30 kg·m/s

• 50 kg·m/s 

•  10 kg·m/s

Answer explanation

This question links to success criteria 4.3.1: I can determine the individual and total momenta values before and after a collision.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.2

Two skaters begin at rest. After they push off each other,...

• Skater 1 experiences a greater change in momentum

• Skater 2 experiences a greater change in momentum

• Both skaters have equal and opposite momenta

• This is impossible, if they weren't moving they cannot start moving.

Answer explanation

This question links to success criteria 4.3.2: I can use conservation of momentum to predict the outcomes of various types of collisions.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.2

A person on a stationary skateboard throws a bowling ball so that it has a new momentum of -50 kg⋅m/s. What is the momentum of the person after the throw? 

• 0 kg⋅m/s

• 50 kg⋅m/s

• • -50 kg⋅m/s

• 75 kg⋅m/s

Answer explanation

This question links to success criteria 4.3.2: I can use conservation of momentum to predict the outcomes of various types of collisions.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.2

Two identical bowling balls are thrown so that they each have a momentum of 5 kg⋅m/s. Ball 1 collides with stationary pin 1, and pin 1 has a momentum of 1 kg⋅m/s after the collision. Ball 2 collides with stationary pin 2, and pin 2 has a momentum of 3 kg⋅m/s after the collision. Which of the following is true?

• After the collisions both balls stop moving.

• After the collision both balls have equal momentum

• After the collision Ball 2 has more momentum than Ball 1

• After the collision, Ball 1 has more momentum than Ball 2

Answer explanation

This question links to success criteria 4.3.2: I can use conservation of momentum to predict the outcomes of various types of collisions.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.2

Two football players are running towards each other. Player A has a momentum of 150 kg⋅m/s. Player B has a momentum of -187.5 kg⋅m/s.   Which of the following best describes their motion after they collide.

• They do cancel each other out and stop moving.

• They do cancel each other out and both bounce off, reversing direction

• They don't cancel each other out and move in the negative direction.

• They don't cancel each other out and move in the positive direction

Answer explanation

This question links to success criteria 4.3.2: I can use conservation of momentum to predict the outcomes of various types of collisions.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.3

Tycho's lab group found that the marbles after the collision had less momentum than expected. Which of the following best explains why momentum did not appear to be conserved?

• The marbles experienced friction from the table and the rulers.

• Tycho didn't record the video in slow motion.

• The marbles had different masses.

• Tycho collected his data on a hot day.

Answer explanation

This question links to success criteria 4.3.3: I can identify conditions that mean momentum is not conserved.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.3 The car in the picture was moving quickly and the pole had been stationary. The pole was able to bring the car to a stop without being moved. Why did momentum not appear to be conserved?

• The pole is narrower and was able to apply its force only to the front of the car.

• The pole is attached to the Earth, and that contact exerts an outside force on the system.

• The front of the car crumpled reducing the force of impact. This lower force couldn't move the pole.

• Momentum does not get conserved in car crashes.

Answer explanation

This question links to success criteria 4.3.3: I can identify conditions that mean momentum is not conserved.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2

4.3.3

In which situation(s) might it appear that momentum is not conserved?

• When both objects were moving before the collision

• When the event does not occur in a "closed system."

• When the objects are moving in ellipses

• When the objects colliding are tectonic plates.

Answer explanation

This question links to success criteria 4.3.3: I can identify conditions that mean momentum is not conserved.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-2