Rotational Kinematics of a thin rod

AI Thread Summary
The discussion focuses on the rotational kinematics of a thin rod attached to a frictionless hinge, tipping over from a vertical position. The key questions involve determining the angular speed and angular acceleration of the rod just before it strikes the floor. Participants suggest using energy conservation principles to analyze the problem, particularly focusing on rotational kinetic energy. Additionally, they recommend considering the torque acting on the rod to facilitate calculations. The conversation emphasizes the importance of understanding these concepts to solve the homework problem effectively.
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Homework Statement


A thin rod (length = 1.50 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from rest, tips over and rotates downward. (a) What is the angular speed of the rod just before it strikes the floor? (b) What is the magnitude of the angular acceleration of the rod just before it strikes the floor?

Homework Equations


No clue.

The Attempt at a Solution


radius = 1.50 m
angular displacement = 90 degrees
Any suggestion as to where to start would be great...
 
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Hints:
(a) Consider energy conservation. How would you write the rotational kinetic energy of this object?
(b) What's the torque on the object?
 
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