Centre of Mass 4 Question 5
6. There is a rectangular plate of mass of dimensions . The plate is held in horizontal position by striking small balls uniformly each of mass per unit area per unit time.These are striking in the shaded half region of the plate. The balls are colliding elastically with velocity . What is ?
It is given
(2006, 6M)
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Answer:
Correct Answer: 6.
Solution:
Equating the torque about hinge side, we have
Substituting the given values, we get