- #1
anyone1979
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[SOLVED] Plane facts, I
Is this right?
A ramp has an incline angle of 25 degress. How much work must you do if you are to drag a 50 kg mass a distance of 100m upward along the ramp? Assume that the coefficient of kinetic friction is uk = .35 and that you apply the force parallel to the plane.
uk mg cos(25) = (.35)(50)(9.8)cos(25) = 155N
Wfk = (155)(100)cos(180) = -15.5*10^3J
W = (100)(100)(1) = 1*10^4J
Wtot = 1*10^4 + 15.5*10^3 = 25.5*10^3J
Is this right?
A ramp has an incline angle of 25 degress. How much work must you do if you are to drag a 50 kg mass a distance of 100m upward along the ramp? Assume that the coefficient of kinetic friction is uk = .35 and that you apply the force parallel to the plane.
uk mg cos(25) = (.35)(50)(9.8)cos(25) = 155N
Wfk = (155)(100)cos(180) = -15.5*10^3J
W = (100)(100)(1) = 1*10^4J
Wtot = 1*10^4 + 15.5*10^3 = 25.5*10^3J