Mv2 is mass times veolicty squared. And r is the radius. The back ground of this lab is to find out what is the centrifugal force.
Centrifugal force is the force that wants to get away from the center of the circle.
A person may be spinning a bucket or in our case we had a piece of rope and a cookie jar. To get the centrifugal force you have to find the radius of the person's arm and the different periods it takes the bucket to move slowly around the person's head. First of all you take the piece of rope and then tie it to the jar. Start to spin it in a constsant pace. Try to slow it down so there is less tension on the rope and then time how long it takes the bucket to slow down.