Posted by **caa** on Thursday, February 14, 2013 at 9:47pm.

A child on a sled reaches the bottom of a hill with a velocity of 10.0 and travels 23.0 along a horizontal straightaway to a stop.If the child and sled together have a mass of 58.0 , what is the magnitude of the average retarding force on the sled on the horizontal straightaway?

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