Friction Force part 2

Today in class we white boarded our labs from yesterday. We did a lab on friction force. Basically, Mr. Dickie had us pick between three choices: Surface area, normal force, and mass and we had to find out the relationship with a friction force.

So when we got in a circle to discuss, most people had tested mass. We didnt conclude whether or not mass affects friction or not, mr. dickie tried explaining but we sort of skipped it and we ran out of time, so we will find out tomorrow. Surface area, however, does not affect friction. We found out that friction opposes surface movement. Normal force also was not officially concluded either because it ties in with mass.

Mr dickie also gave us an example to think about on the board. He put a magnet on the board and asked why it doesnt slide down. We stated all the forces acting on the magnet. First, there is a magnetic force towards the board. Second, normal forces of the board are pushing towards the magnet. Third, gravity is pulling a downward force, but the force of friction is pulling up so it does not slide down.

Thats basically what we did for the day, not too much since it was a short schedule.

I hope this somewhat made sense...

Random fact of the day: The king of hearts is the only king without a mustache.