View Single Post
Dielere
#1
Mar6-12, 11:01 AM
P: 6
1. The problem statement, all variables and given/known data
The coefficient of friction is to be found from a skateboard and rider rolling down a ramp, which has an angle of 5 degrees. The skateboard accelerates at .5308 m/s^2. The mass of the rider and skateboard is 91.3 kg, or 895 newtons. The other data would be gravity.

2. Relevant equations
Coefficient of friction = Fx/Fn


3. The attempt at a solution
I found what I thought to be the acceleration the skateboard would have had if it was friction less. That was .8526, however now I am pretty sure I did something wrong. Then I found the force of gravity at 5 degrees, which was 9.39722. But I know there is something very wrong with what I'm doing. Then putting .5308/9.39722 to find a coefficient of about .05. I'm certain I'm doing something wrong, and the mass can be used to find it. But I am lost. Any help would be greatly appreciated!
Phys.Org News Partner Science news on Phys.org
Bees able to spot which flowers offer best rewards before landing
Classic Lewis Carroll character inspires new ecological model
When cooperation counts: Researchers find sperm benefit from grouping together in mice