A body is falling under gravity from rest. When it loses gravitational potential energy by U, its speed is v. The mass of the body shall be

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Solution

The correct option is C

According to the Law of conservation of energy,
Loss in potential energy = gain in kinetic energy $\Rightarrow U = \frac{1}{2} m v^{2} ∴ m = \frac{2 U}{v^{2}}$

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A body is falling under gravity from rest. When it loses gravitational potential energy by U, its speed is v. The mass of the body shall be

The correct option is C According to the Law of conservation of energy, Loss in potential energy = gain in kinetic energy ⇒U=12mv2 ∴m=2Uv2

The correct option is C

According to the Law of conservation of energy,
Loss in potential energy = gain in kinetic energy $\Rightarrow U = \frac{1}{2} m v^{2} ∴ m = \frac{2 U}{v^{2}}$