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

Question

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

TestHub · Accepted Answer

For (A) : By COME total mechanical energy of the two objects For (B) : By using reduced mass concept 2 1 ​ μ v rel 2 ​ − r G ( 4 m ) ( m ) ​ = 0 where μ = m + 4 m ( m ) ( 4 m ) ​ = 5 4 ​ m ⇒ v rel ​ = r 10 G m ​ ​ For (C) total KE = − PE = r G ( m ) ( 4 m ) ​ = r 4 Gm 2 ​

Physics - Electrostatics Question with Solution | TestHub

Options:

Doubts & Discussion