A point P lies on the axis of a fixed ring of mass M and radius R, at a distance 2R from its center O. A small particle starts from P and reaches O under gravitational attraction only. Its speed at O will be
A
zero
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Applying energy conservation form P to O
K i + U i = K f + U f
O + (M o ) 
= 
m o V 2 + (m o ) 
V = 
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