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ARC-Challenge / MEA_2013_8_15 / A ball is thrown downward onto a concrete floor and bounces upward. What…

Problem

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question

A ball is thrown downward onto a concrete floor and bounces upward. What supplies the upward force that makes the ball bounce?

choices

  • the floor
  • the pull of gravity
  • the air friction on the ball
  • the person that throws the ball

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Source and history

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