Two bodies of masses m_(1)" and "m_(2) are initially at rest at infinite distance aprat. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance r between them is

Two bodies of masses m_(1)" and "m_(2) are initially at rest at infini

1.	Two bodies of masses m_(1)" and "m_(2) are initially at rest at infinite distance aprat. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance r between them is
Answer» `[2G ((m_(1)-m_(2)))/(R )]^(1/2)` `[(2G)/(r ) (m_(1)+m_(2))]^(1/2)` `[(r )/(2G (m_(1)m_(2)))]^(1/2)` `[(2G)/( r) m_(1)m_(2)]^(1/2)` Answer :B