Two particles of equal mass go around a circle of radius 
under the action of their mutual gravitational attraction. The speed 
of each particle is
A
B
C
D
.
Text Solution
Verified by ExpertsThe correct answer is:
D
: The two masses, separated by a distance 
are going around their common center of mass,
the centre of the circle.
Attractive force 
. But the two masses are going round the centre of mass or the reduced mass 
is going round a circle of radius 
distance of separation
Centrifugal force 
Now, 
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