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## Homework Statement

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/s

^{2}

the acceleration: -7.3125 m/s

^{2}

And that's it. If it helps we were pushing blocks and used a motion detector to determine the rate of deceleration.

## Homework Equations

μ

_{k}*F

_{N}=F

_{f}

F

_{N}=m*g

F

_{net}=m*a

## The Attempt at a Solution

Let's say I start with the normal force, which I get 9.81m/s

^{2}*.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.