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Questions and Answers
What is the relationship between the sums of the components of momentum vectors before and after a collision?
What is the relationship between the sums of the components of momentum vectors before and after a collision?
- They are equal only if the objects have the same mass
- They are equal before and after the collision (correct)
- They are greater before the collision
- They are greater after the collision
What is a closed system?
What is a closed system?
- A system that does not gain or lose mass (correct)
- A system that has no momentum
- A system that has constant velocity
- A system that gains or loses mass
What does the momentum of moving objects depend on?
What does the momentum of moving objects depend on?
- The size of the objects
- The speed of the objects (correct)
- The direction of the objects
- The mass of the objects
What happens to the momentum of a freight train if it has twice as much mass and rolls at the same speed?
What happens to the momentum of a freight train if it has twice as much mass and rolls at the same speed?
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What happens to the astronaut when they throw a baseball in outer space?
What happens to the astronaut when they throw a baseball in outer space?
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