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OpenStudy (anonymous):
A person pushes a box up a ramp that is 3 m long, and 1 m high. If the box has a mass of 20 kg, and the person pushes with a force of 80 n, what is the efficiency of the ramp
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OpenStudy (anonymous):
|dw:1417752772931:dw|
OpenStudy (anonymous):
Fk=K* Fn K=Fk/Fn
OpenStudy (anonymous):
sum the forces in y and x directions
OpenStudy (anonymous):
to sum the forces in x and y you need the angle of the ramp which is not given directly but it could be found using tan function since adj and opp are given. tan(theta)=opp/adj=1/3 theta=atan(1/3)
OpenStudy (anonymous):
i hope that clear
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