Homework Help: Physics

Posted by Kristy on Sunday, October 10, 2010 at 8:58pm.

I'm so confused on how to find mu. A 68 kg box slides down a 27 degree ramp with an acceleration of 3.10 m/s squared. The acceleration due to gravity is 9.81 m/s squared. It wants me to find mu between the box and the ramp but I don't even know where to start. Can you please walk me through it?

Physics - Taylor, Sunday, October 10, 2010 at 10:40pm
I'm assuming by mu you mean the coefficient of friction, u(subk)
to find it just sum your forces in the x and y directions and solve for u(subk)
use the formula
sum of the forces = mass x acceleration

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