a body falls freely under gravity . its velocity is v when it has lost potential energy equal to U. what is the mass of the body?

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Solution

Initial velocity, u=0
Final velocity, v=v
Since potential energy is transformed into kinetic energy, so
$P . E = K . E U = \frac{1}{2} {mv}^{2} or m = \frac{2 U}{v^{2}}$

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a body falls freely under gravity . its velocity is v when it has lost potential energy equal to U. what is the mass of the body?

Initial velocity, u=0 Final velocity, v=v Since potential energy is transformed into kinetic energy, so P.E=K.EU=12mv2or m=2Uv2

Initial velocity, u=0
Final velocity, v=v
Since potential energy is transformed into kinetic energy, so
$P . E = K . E U = \frac{1}{2} {mv}^{2} or m = \frac{2 U}{v^{2}}$