1. The problem statement, all variables and given/known data Design and complete an investigation to determine how the following factors affect the force of friction: weight surface are speed 2. Relevant equations The magnitude of the force that is provided by an elastic band is directly related to the distance the elastic band is stretched. 3. The attempt at a solution Well I am kind of clueless. I thought I could use some tissue boxes, with different weight, surface area to do the first 2. Then I could just increase the speed on the third one.. What I am confused about I am not sure what really to do.. So the amount of how much the elastic band is stretched will show me how much force I put in.. How do I convert that force into N? Also not sure how really to do the experiment.. Maybe if I become clear about the elastic band thing then I'll understand some more.. Because right now I don't understand how I could prove how the previously mentioned factors affect the force of friction.