Two objects of masses m and 4m are at rest at infinite separation. They move towards each…
Physics · JEE Main · NTA Exams — Gravitation
Two objects of masses m and 4m are at rest at infinite separation. They move towards each other under mutual gravitational attraction. Then, at a separation r, which of the following is true?
- The total energy of the system is zero.
- The force between them is not zero.
- The centre of mass of the system is at rest.
- All the above are true.
Answer
(D) All the above are true.
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