Elastic Collisions in One Dimension


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What happens to two objects after they collide in an elastic collision?

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1. Which conservation law applies to elastic collisions, but NOT to inelastic collisions?

2. A 2 kg toy car with a velocity of 5 m/s collides elastically with a second toy car that has a velocity of -2 m/s. After the collision, the 2 kg toy car has a velocity of 3 m/s and the second car has a velocity of 2 m/s. Using the conservation of momentum, what is the mass of the second car?

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About This Quiz and Worksheet

One-dimensional elastic collisions are the focus of this quiz and worksheet combination. See if you know what happens to two objects during an elastic collision and if you can choose the correct answer for a practice problem to find the final velocity under a given set of circumstances.

Quiz and Worksheet Goals

You can check your knowledge of collisions with quiz questions on the topics below:

  • A conservation law applying to elastic, not inelastic, collisions
  • Finding mass using conservation of momentum
  • Determining velocity with conservation of kinetic energy
  • Finding the final velocity using the given elastic collision velocity relation

Skills Practiced

  • Problem solving - use what you know to solve practice problems involving velocity
  • Defining key concepts - ensure that you can name the conservation law that applies only to elastic collisions
  • Information recall - remember what you have learned about finding mass

Additional Learning

To learn more, check out the lesson titled Elastic Collisions in One Dimension. With it, you can look into the following additional topics:

  • Elastic vs, inelastic collisions
  • The conservation of momentum
  • A sample problem involving bumper cars