Asked by HELP ASAP

how do u calculate the work done by friction of a box moving down a ramp?
Answered by Anonymous
The friction force up the ramp times the distance moved down the ramp. It is negative of course.
Work done by friction = - mu m g cos(ramp angle) * distance moved down ramp
Answered by HELP ASAP
what is "mu"?
Answered by Anonymous
The coeficient of friction
Answered by HELP ASAP
so if my mu is 0.042N
g is 9.8
m is 1.117 kg
ramp angle is 4
and distance is 1.0
then my answer is -0.46?
Answered by Anonymous
Yes
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