a 55.0 kg diver fallsfreely from a diving platform that is 3.00 m above the surf

Question

a 55.0 kg    diver fallsfreely from a diving platform that is 3.00 m above the surface of the water in apool. When she is 1.00 m   above the water , what are her kinetic energy withrespect to the water's surface? Can you please help me arrive at the answer a 55.0 kg    diver fallsfreely from a diving platform that is 3.00 m above the surface of the water in apool. When she is 1.00 m   above the water , what are her kinetic energy withrespect to the water's surface? Can you please help me arrive at the answer

Explanation / Answer

Potential energy at 3 m is P = mgh = 55 kg 8 9.8 * 3 = 1617J Potential energy at height of 1 m is P ' = m g h' = 55 8*9.8 *1 = 539 J So, from law of cinservation of energy , kinetic energy atheight of 1 m from the surface of the water K = P - P '       K = 1078 J

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