Question

Q A plank, 8m long, has one end Im 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 100kg and the coefficient of sliding friction between it and plank is 0.3 ?
(a) 50.2kgf (b) 25.5kgf (c)70kgf (d) 43.3 kgf​

Answer 1

Answer:

c is the answer please mark me brainlist and thanks me