Posted by **Melissa** on Friday, June 15, 2012 at 7:42pm.

Some children go tobogganing on an icy hill. The start from the rest at the top of the hill. The toboggan and children have a combined mass of 94 kg. The height of the first hill a is 12.0m the height of b is 0, and the height of c is 3.0m. If friction is small enough to be ignored , apply the law of conservation of energy to determine

A) the total mechanical energy of the toboggan at a relative to b

B) the sped of the toboggan at b

C) the speed of the toboggan at c

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