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A roller coaster car of mass 800 kg when released from rest at point A (height...

A roller coaster car of mass 800 kg when released from rest at point A (height h above the ground) slides along the track and inside the loop of radius 16.0 m. The car never loses contact with the track.

  1. Draw below a free body diagram for the car at the top of the loop. If the speed of the car at the top of the loop (point C) is 17 m/s, what is the normal force at that point?
  2. If the car was released at a height 55 m and the speed at the top of the loop is 17 m/s, what is the amount of thermal energy produced by friction from the point of release to the top of the loop?

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