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JEE Main 2024 (6 Apr, Shift 1) · Escape Velocity

Escape Velocity question from JEE Main 2024 (6 Apr, Shift 1)

Q18JEE Main 2024 · 6 APR · SHIFT 1Easy

Escape Velocity

To project a body of mass $m$ from earth's surface to infinity, the required kinetic energy is (assume, the radius of earth is $R_E, g =$ acceleration due to gravity on the surface of earth):

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Answer: (c)

KE needed $= \frac{GMm}{R_E}$
With $GM = gR_E^2$ : KE $= mgR_E$
So the answer is (c) $mgR_E$ .

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