Posted by Science on .
38. A box slides down a 30.0 degree ramp with an acceleration of 1.20 m/s^2. Determine the coefficient of kinetic friction between the box and the ramp.
I have no idea how to do this with only knowing the aceleration and the angle. Please tell me how to do this.

physics question 
DrBob222,
help on physics

bob Joe 
bobpursley,
The equation...
Netforcedown ramp= mass*acceleration applies
Netforce= weightdownrampfriction
= mgSinTheta mu*mg*CosTheta
solve for mu. You need to be certain you can figure how both those terms were derived.