- 90

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**1. Homework Statement**

a 5.1*10^2 kg bundle of bricks is pulled up a ramp at an incline of 14 degrees to a construction site. the force needed to move the bricks up the ramp is 4.1*10^3 N. What is the coefficient of static fiction between the bricks and the ramp?

**2. Homework Equations**

well Fsmax= 4.1*10^3 because thats how much force is needed to overcome in order to move the bricks and Fn=510*9.81*cos14 then you would have to divide to get Us and i got 0.84 but the book says its wrong. so could some1 please help me figure out what i did wrong?

thx a ot.

**3. The Attempt at a Solution**