# Homework Help: I am doing a physics experiment to do with the effects of friction on a flat surface.

1. Mar 25, 2012

### r123

1. The problem statement, all variables and given/known data
by rolling 5 different balls down a ramp from 5 different heights onto 5 different surfaces i recorded the time taken from when the ball leaves the ramp until it stops, also recording the displacement of the ball from the the bottom of the ramp. with these results i need to 'investigate motion and related energy transformations experimentally, and use the newtonian model in one and two dimensions to analyse motion in the contexts of transport and related aspects of safety, and motion in space.'

2. Relevant equations
0.5mv^2 mgh fnet=ma constant acceleration formulas fnet=μN

3. The attempt at a solution
using the above formulas i can:
- calculate the initial velocity in two different ways and compare these
- find the co-efficient of friction
- calculate the frictional force

what else can i calculate?

i am stuck on what i am trying to prove/disprove (the aim), i.e. what am i going to do with these calculations

also, what graphs would be good to use to show my understanding?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution