1. The problem statement, all variables and given/known data Please see attached picture. 2. Relevant equations Ff=uFn 3. The attempt at a solution I'm really not sure where to start, since I don't know the coefficient of friction. Fn = ma Fn = 0.1kg(9.8m/s^2) Fn = 0.98N Does this mean that the force in the image is 0.98N as well? Any hints would be appreciated.