A meter stick with a mass of .160kg is pivoted about one end so it can rotate without friction about a horizontal axis. The meter stick is held in a horizontal position and released. As it swings through the vertical, calculate (a) the change in gravitational potential energy that has occured; (b) the angular speed of the stick; (c) the linear speed of the end of the stick opposite the axis. (d) Compare the answer in part (c) to the speed of a particle that has fallen 1.m, starting from rest.
The Attempt at a Solution
i have no idea, i cant even get the first part. i beleive it is supposed to be something kind of like this sitting on a table:
and then they drop it while it is spinning?
idk i could use some help