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Homework Help: Physics

Posted by Anonymous on Thursday, February 16, 2012 at 7:30pm.

You want to push a 66-kg box up a 30 ramp. The coefficient of kinetic friction between the ramp and the box is 0.35. With what magnitude force parallel to the ramp should you push on the box so that it moves up the ramp at a constant speed?
N

Physics - bobpursley, Thursday, February 16, 2012 at 5:04pm

You have to overcome friction and gravity

gravity down the plane:mg*SinTheta
friction: mg*mu*cosTheta

add them.

Physics - Anonymous, Thursday, February 16, 2012 at 5:15pm

Thanks

Physics - Anonymous, Thursday, February 16, 2012 at 7:25pm

I did that but it gives me wrong answer

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