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Two particle of masses m and 2m are at a...

Two particle of masses `m` and `2m` are at a distance `3r` apart at the ends of a straight line `AB`. `C` is the centre of mass of the system. The magnitude of the gravitational force on a unit mass placed at `C` due to the masses is

A

zero

B

`(7Gm)/(4r^(2))`

C

`(9Gm)/(4r^(2))`

D

`(3Gm)/(2r^(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
`F=(Gm_(1)m_(2))/(R^(2)), F_(net)=F_(2)-F_(1)`
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