A box with a mass 2 kg is sliding along on a friction-free surface at 9.87 m/s at a height of 1.81 m. It travels down the hill

Question

A box with a mass 2 kg is sliding along on a friction-free surface at 9.87 m/s at a height of 1.81 m. It travels down the hill and then up another hill. 
Find the initial kinetic energy. 
Find the initial potential energy.

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