1. The problem statement, all variables and given/known data See, I was collecting data for a lab, and now when I look it at, I'm being asked to find the kinetic friction force and the coefficient of friction. What I was given was: the mass of the block: .261 kg gravity: 9.81 m/s2 the acceleration: -7.3125 m/s2 And that's it. If it helps we were pushing blocks and used a motion detector to determine the rate of deceleration. 2. Relevant equations μk*FN=Ff FN=m*g Fnet=m*a 3. The attempt at a solution Let's say I start with the normal force, which I get 9.81m/s2*.261kg=2.5604N From there I can't see any more steps I can take. The only forces acting on the object are the friction force, the applied force, which was not measured, gravity, and the normal force. Given the equation and with the task of finding two unknowns, I'm clueless on how to continue.