Rotational Motion Question 121
Question: 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
Options:
A) of the box remains constant
B)of the (box + ball), system remains constant
C)of the ball remains constant
D)of the ball relative to the box remains constant
Show Answer
Answer:
Correct Answer: B
Solution:
[b]As no external force acts on the (ball + box) system, hence velocity of the system remains constant.
