Two bodies of masses m_1 and m_2 initially at rest at infinite distance apart move towards each other under gravitational force of attraction. Their relative velocity of approach when they are separated by a distance r is (G= universal gravitational constant.)

Two bodies of masses m_1 and m_2 initially at rest at infinite distanc

1.	Two bodies of masses m_1 and m_2 initially at rest at infinite distance apart move towards each other under gravitational force of attraction. Their relative velocity of approach when they are separated by a distance r is (G= universal gravitational constant.)
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)/rm_(1)m_(2)]^(1//2)` ANSWER :B