WAEC - Physics (2023 - No. 10)
A planet has mass, M, and radius R, If the universal gravitational constant is G, what is the expression for the escape velocity of an object on the planet?
\(\frac{\sqrt{GR}}{2}\)
\(\frac{\sqrt{2GM}}{R}\)
\(\frac{\sqrt{2G}}{R}\)
\(\frac{\sqrt{GM}}{R}\)
Explanation
The expression for the escape velocity \(v_e\) of an object from a planet of mass M and radius R using the universal gravitational constant G is:
\(v_e = \frac{\sqrt{2GM}}{R}\)
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