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Two point objects of masses m and 4 m ar...

Two point objects of masses m and 4 m are at rest at an infinite separation they move towards each other under mutual gravitational attraction if G is the universal gravitational constant, then at a separation r

A

the total energy of the two object is zero

B

their relative velocity of approach is `((10Gm)/(r ))^(1//2)` in magnitude

C

the total kinetic energy of the objects is `(4Gm^(2))/(r )`

D

net angular momentum of both the particles is zero about any point

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A, B, C, D
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