A plank, 8 m long, has one end 1 m higher than the other. What minimum force parallel to the plank will be necessary to push a box up it, the box and its contents having a mass of 100 kg and the coefficient of sliding friction between it and the plank being 0.3 ?

A plank, 8 m long, has one end 1 m higher than the other. What minimum

1.	A plank, 8 m long, has one end 1 m higher than the other. What minimum force parallel to the plank will be necessary to push a box up it, the box and its contents having a mass of 100 kg and the coefficient of sliding friction between it and the plank being 0.3 ?
A.	50.2 kgf
B.	25.5 kgf
C.	75.0 kgf
D.	42.3 kgf
Answer» E.

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A plank, 8 m long, has one end 1 m higher than the other. What minimum force parallel to the plank will be necessary to push a box up it, the box and its contents having a mass of 100 kg and the coefficient of sliding friction between it and the plank being 0.3 ?

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