Question

Two bodies, each of mass M, are kept fixed with a separation 2L. A particle of mass m is projected from the midpoint of the line joining their cehntres, perpendicualr to the line. The gravitational constant is G. The correct statement (s) is (are)
A. The minimum initial velocity of the mass m to escape the gravitational field of the two bodies is 4 `sqrt((GM)/(L))`
B. The minimum initial velocity of the mass m ot escape the gravitational field of the two bodies is 2 `sqrt((GM)/(L))`
C. The minimum initial velocity of the mass m to escape th egravitational field of the two bodies is `sqrt((2GM)/(L))`
D. The energy of the mass m remains constant

Answer 1

Correct Answer - B::D

`(GMm)/(L)xx2=(1)/(2)mv^(2)`
`v=2sqrt(("am")/(L))`
energy of system is constant, not of the mass m