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Conservation of mechanical energy

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By Expert Faculty of Sri Chaitanya
Question

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water (in m/s) at the turbine is  (g=9.8m/s2)

Moderate
Solution

Potential energy of water = kinetic energy at turbine 
mgh=12mv2v=2gh=2×9.8×19.6=19.6m/​​s


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