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Posted by on Monday, December 13, 2010 at 8:55pm.

A 16kg child on roller skates rolls 2m down an incline at 20 degrees with the horizontal. With no friction, what is the total kinetic energy of the child at the bottom of the incline?

  • Physics - , Tuesday, December 14, 2010 at 12:21am

    It falls a vertical distance H = 2 sin 20 meters.

    In the process, the kinetic energy increases by M g H.

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