# Another ball rolling down the ramp

1. Apr 27, 2010

### Puklain

Another "ball rolling down the ramp"

i've looked through the physics forum without finding the problem solved.

1. The problem statement, all variables and given/known data
I want to compare theoretical and practical data, with a ball "rolling" down a ramp. the problem comes when i try to measure all the factors, so far the things i NEED to get in the equations:
Rolling resistance
Windforce / aoredynamics
I also think there should be something about "boyle-mariottes law"
basically get the theoretical as close to the practical as possible

Data
ball weight: 0.696kg
ramp length: 207 cm
ramp height: 4 cm

3. The attempt at a solution
My idea was to compare acceleration by setting windforce to 0 (thats why the low height).
i got around 0.18 newton in theory and 0.05 in practice(the force on the ball) .

therefore im asking for some guidens, now what to do ? and how to do ?

i hope your understand my problem, because im not the best at making others understand
and ofcourse looking forward to some help.
if you need some more data, please ask and ill try to get it as soon as possible (:

Regards Jesper.