5. In the game of shuffleboard, you push plastic disks forward and then release them so that they slide across a level playing surface. Once you release a disk, you are no longer pushing and it gradually skids to a stop. Its final position determines your score. As each disk skids to a stop, what becomes of the kinetic energy it had when you released it? That energy is

 

  • now elastic potential energy in the disk.
  • still present in the disk, as it must be because kinetic energy is conserved and can’t be created or destroyed.
  • now thermal energy in the disk and playing surface.
  • now gravitational potential energy in the disk.

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