1. what happened to the amount of friction between the surface and the shoe was the force of gravity was increased?
2. when a peice of paper was placed between the shoe and the surface(table), was more force, less force, or the same force needed to pull the shoe?
we had a lab in physics class. it was called a sticky-shoe lab. these are the questions i need to answer but i am not sure if my answer is correct.
The Attempt at a Solution
1. the amount of friction would increase as the force of gravity increases, because greater force of gravity means more mass . (but i am not sure how to explain that friction will increase also)
2. less force was required to pull the shoe because when a piece of paper was placed beween the shoe and the surface, the coeifficient of firction was no longer dealing with rubber on a dry surface but a sheet of paper (wood?).
( here is it correct to say that the coeifficient of friction became wood on dry surface, and would this result less friction?)
please help me :)