A planet has mass, M, and radius R, If the universal gravitational constant is G,...
PHYSICS
WAEC 2023
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?
- A. \(\frac{\sqrt{GR}}{2}\)
- B. \(\frac{\sqrt{2GM}}{R}\)
- C. \(\frac{\sqrt{2G}}{R}\)
- D. \(\frac{\sqrt{GM}}{R}\)
Correct Answer: B. \(\frac{\sqrt{2GM}}{R}\)
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:
\(v_e = \frac{\sqrt{2GM}}{R}\)
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *