zaxoanl
  • zaxoanl
A student throws a ball with a speed v=15m/s at the rear of the receding truck traveling 7m/s. If the collision is elastic and perpendicular to the surface of the truck , what will be the rebound velocity of the ball? answer is 1m/s but i don't know how to calculate it
Physics
schrodinger
  • schrodinger
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anonymous
  • anonymous
@Michele_Laino help please
Michele_Laino
  • Michele_Laino
hint: since the collision is elastic, then the total kinetic energy is conserved, and the total momentum is also conserved
anonymous
  • anonymous
what would be the formula we will use?

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