- #1
Medgirl314
- 561
- 2
Homework Statement
Two men loading a 900 kg piano onto a truck lose control and the piano slips, rolling down the loading ramp. The ramp is a 12 degree incline that is 3.2m long. If the piano accelerates down the ramp at 0.4m/s^2, find the coefficient of rolling friction.
Homework Equations
F=ma
The Attempt at a Solution
a=g(cos)(theta)-(mu)g(sin)(theta
mu=g(cos)(theta)=9.8(cos12)+0.4
mu=9.9
This looks wrong. Where did I mess up?
Thanks!