Gravitation Question 170
Question:If the radius and acceleration due to gravity both are doubled, escape velocity of earth will become [RPMT 2002]
Options:
A)11.2 km/s
B) 22.4 km/s
C) 5.6 km/s
D) 44.8 km/s
Show Answer
Answer:
Correct Answer: B
Solution:
$ [v=\sqrt{2gR}] $ .
If g and R both are doubled then v will becomes two times i.e. 11.2 × 2 = 22.4 km/s
