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postfan
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Homework Statement
A uniform bar of mass and length is pivoted at one end and is held vertically as shown. After the bar is released, it swings downward with no friction in the pivot.
At the instant the bar is at the bottom of the swing, find the magnitudes of the following quantities:
The angular speed of the bar
The angular acceleration of the bar
The linear speed of the free end of the bar
The horizontal component of the acceleration of the free end of the bar
The vertical component of the acceleration of the free end of the bar
The linear speed of the midpoint of the bar
The horizontal component of the acceleration of the midpoint of the bar
The vertical component of the acceleration of the midpoint of the bar
The horizontal component of the force exerted on the bar by the hinge
The vertical component of the force exerted on the bar by the hinge
Homework Equations
The Attempt at a Solution
For the first part I found the MoI and got 1/3ML^2 through parallel axis, then used conservation of energy : mgh=.5 I w*2 and got sqrt(3*g/L) (used L/2 for h), but it's wrong.
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