NDA 2026 Physics question

Two astronauts X and Y float in deep space far from external forces. Initially, they are at rest relative to one another. X throws a tool towards Y. Consider the two astronauts and the tool as one system. Which one of the following statements is correct ?

(A)The centre of mass of the system moves towards Y.
(B)X moves and the centre of mass of the system follows him.
(C)The centre of mass follows the tool.
(D)The centre of mass remains fixed.Correct

Answer: (D)

Solution

Throwing the tool involves only internal forces. With no external force, the momentum of the system stays

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Question ID VK-033409