7-49(b).A river is flowing with a speed of 3.74 m/s just upstream from a waterfall of vertical height 8.74 m. During each second 7.12X104 kg of water pass over the fall.
(a) [We will ignore this part]

(b) If there is complete conversion of gravitational potential energy to kinetic energy, what is the speed of the water at the bottom of the fall?

(Note: This is actually an unrealistic assumption; some of the energy in the fall will be converted into heat)


 
No. It is moving and at an elevation.

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