Solving Torque/Axel Problem: Angular Acceleration & Velocity

[scarletx09]

Homework Statement

A thin, uniform 3.70- bar, 90.0 long, has very small 2.50- balls glued on at either end (the figure ). It is supported horizontally by a thin, horizontal, frictionless axle passing through its center and perpendicular to the bar. Suddenly the right-hand ball becomes detached and falls off, but the other ball remains glued to the bar.

Find the angular acceleration of the bar just after the ball falls off

Find the angular velocity of the bar just as it swings through its vertical position.

Homework Equations

The Attempt at a Solution

i think i need to use torque and energy principles

 

[tiny-tim]

welcome to pf!

hi scarletx09! welcome to pf!

… i think i need to use torque and energy principles

looks good!

what do you get? ​