Gravitation Question 153

Question: Given mass of the moon is 1/81 of the mass of the earth and corresponding radius is 1/4 of the earth. If escape velocity on the earth surface is11.2 km/s, the value of same on the surface of the moon is [CPMT 1997; AIIMS 2000; Pb. PMT 2001]

Options:

A) 0.14 km/s

B) 0.5 km/s

C) 2.5 km/s

D) 5 km/s

Show Answer

Answer:

Correct Answer: C

Solution:

On earth [ve=2GMR=11.2,,km/s]

On moon [vm=2GM×481×R=29,2GMR] [=29×11.2=2.5,,km/s]



NCERT Chapter Video Solution

Dual Pane