What do the negative and positive signs in velocities and momentum indicate?

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter11: Collisions
Section: Chapter Questions
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  1. What do the negative and positive signs in velocities and momentum indicate?

  2. How can you say that momentum is conserved?

  3. Which quantities are conserved and not conserved?

  4. How is elastic/inelastic collision achieved in terms of mass and velocities?

  5. What is an inelastic collision? What is a perfectly inelastic collision? How can you demonstrate these using the simulation?

  6. In real-life examples, what do you think are the factors that would change the elasticity between two colliding objects?

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