A ball kept in a close box moves in the box making collisions with the walls. The box is kept on a smooth surface. The velocity of the centre of massA. of the box remains constantB. of the box plus the ball sytem remains constantC. of the ball remains constantD. of the ball relative to the box remains constant.

A ball kept in a close box moves in the box making collisions with the

1.	A ball kept in a close box moves in the box making collisions with the walls. The box is kept on a smooth surface. The velocity of the centre of massA. of the box remains constantB. of the box plus the ball sytem remains constantC. of the ball remains constantD. of the ball relative to the box remains constant.
Answer» Correct Answer - B

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