10. A ball kept in a closed box moves in the box making
collisions with the walls. The box is kept on a smooth
surface. The velocity of the centre of mass
(a) of the box remains constant
(b) of the box plus the ball system remains constant
(c) of the ball remains constant
(d) of the ball relative to the box remains constant
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Answer:
The velocity of the centre of mass of the box remains constant.
Explanation:
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