The masses and radii of Earth and Moon are M 1 , R 1 and M 2 , R 2 respectively. Their centre are at a distance d apart. The minimum speed with which a particle of mass m should be projected from a point mid-way between the two centers so as to escape to infinity is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Total potential energy at mid point is 
or – 
(M 1 + M 2 ) m
If v is required escape velocity, the
mv 2 = 
(M 1 + M 2 ) m
v = 
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