Question 1070809
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The energy conservation law says


{{{(mV^2)/2}}} - {{{(mv^2)/2}}} = {{{mg(H-h)}}}.


where g = 9.81 m/s^2 is the gravity acceleration.

Cancel m, the mass, which is the same in both sides. You will get


{{{(V^2)/2}}} - {{{(v^2)/2}}} = {{{g*(H-h)}}}.


Substitute the given data and solve for V.
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