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## Homework Statement

What is the value of the rolling friction force given 1)Fnet=0.24N (deceleration up the ramp) and 2)Fnet=0.21N (acceleration down the ramp)?

## Homework Equations

Fnet = Fgravity - Ffriction (?)

## The Attempt at a Solution

Somehow I need to combine these values to find the frictional force...

So I tried this:

0.24 = 5.0 - Ffric

0.21 = 5.0 - (-Ffric)

elimination

0.03 = -2Ffric

Ffric = 0.015 (disregarding the negative?)

Does this work?