Pulleys -- How to Double Your Strength

This lesson had to be one of the most exciting lessons of our all our simple machines.  To illustrate the strength of using a movable pulley, students participated in two short experiments.

First, students partnered up and took part in a short tug-a-war were we kept track of who won, loss or tied. With that said, anyone who lost their tug-a-war got another chance using the pulley to provide an advantage. Little did the winner know that they would then end up on the wrong side of the pulley!

Mr. Mackenzie would get even!

Below are the clips using the movable pulley.  By tying the string to the door, running it through a movable pulley (reduces friction) and back to the person pulling, the person was able to double their strength.  These videos are a clear example of why one should not end up on the wrong side of the pulley! :)

                                           Caleb versus Caleb

Katie's boots will not stop her now!

Will Mr.Mackenzie redeem himself?