20-11-2014 Conservation of Linear and Angular Momentum Lab #20

Purpose

The purpose of this lab is to find the angular momentum about a point that is external to a rolling ball.

In order to set up this lab you need the Model ME-9821 Rotational Accessory Kit and the ME-9279A Rotational Dynamics Apparatus. We as students were not able to actually preform the lab ourselves so Professor Wolf is the one that demonstrated it to the whole class.

However, before he used the kit we had to find the calculations ourselves. First being the velocity from launch. While we were calculating Professor Wolf used the graph to give us the angular acceleration which turned out to be 5.64rad/s^2.

Then we had to calculate the moment of inertia using the velocity and angular acceleration we found and were given. This is going to be used for the next part of the lab that was also preformed by Professor Wolf.

Then Professor Wolf ran another part of the experiment with the second set up. For this part the ball was launched at the same height but caught in a catcher that spun the disk at a certain angular velocity. He told us to figure out what the angular velocitythrough calculations while he did it experimentally. Our omega turned out to be 1.95 rad/s

This is the apparatus he used to find the omega.

On his graphs he came up with omega =1.775 rad/s.