8. A thin bar of mass M and length L is free to rotate about a fixed horizontal axis through a point at its end. The bar is brought to a horizontal position and then released. Which of the following statement is true regarding its motion?
(A) The angular acceleration of the rod is constant.
(B) The angular momentum about the axis of rotation is constant.
(C) The force exerted by the rod on the hinge at the axis of rotation continuously changes.
(D) The acceleration of the centre of mass is equal to g.
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Answer:
c is right
a,band d is incorrect
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