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Coefficient of Friction

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15
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1. Homework Statement

I just did a lab at school dealing with coefficient of friction for an object on an incline. After all my calculations done, my answer is negative for a cart sliding down, dealing with kinetic friction.

2. Homework Equations



3. The Attempt at a Solution

I have checked all my calculations and have found nothing wrong.
 

Answers and Replies

PhanthomJay
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Well how can we help unless you show us your calcs??
 
15
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My question is whether the coefficient of friction can be negative?
 
PhanthomJay
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Oh, no.
 
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Did you turn the ramp around so the angle was in the 2nd quadrant?
 

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