A thin and uniform rod of mass and length is held vertical on a floor with large friction
PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics
Problem
A thin and uniform rod of mass M and length L is held vertical on a floor with large friction. The rod is released from rest so that it falls by rotating about its contact point with the floor without slipping. Which of the following statement(s) is/are correct, when the rod makes an angle 60∘ with vertical ? [Adv. 2019] [g is the acceleration due to gravity]
(1) The angular speed of the rod will be 2L3g
(2) The radial acceleration of the rod's center of mass will be 43g
(3) The normal reaction force from the floor on the rod will be 16Mg
(4) The angular acceleration of the rod will be L2g