Gravitation Question 129
Question: Escape velocity of a body of 1 kg mass on a planet is 100 m/sec. Gravitational Potential energy of the body at the Planet is[MP PMT 2002]
Options:
A) ? 5000 J
B) ? 1000 J
C) ? 2400 J
D) 5000 J
Show Answer
Answer:
Correct Answer: A
Solution:
$ [v_{e}=\sqrt{\frac{2GM}{R}}=100,\Rightarrow ,\frac{GM}{R}=5000] $ Potential energy $ [U=-\frac{GMm}{R}=-5000,J] $
