Two bodies of masses m_(1) and m_(2) are initially at rest a infinite distance apart. They are then allowed to move towards each other under mutual gravitaitonal 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 a infinite

1.	Two bodies of masses m_(1) and m_(2) are initially at rest a infinite distance apart. They are then allowed to move towards each other under mutual gravitaitonal 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