To slide a block up a rough plane of inclination 30^(@) with the horizontal the minimum force required is five times that required to slide the block down the plane. Both forces act parallel to the plane. What is the coefficient of friction between the block and the plane?

To slide a block up a rough plane of inclination 30^(@) with the horiz

1.	To slide a block up a rough plane of inclination 30^(@) with the horizontal the minimum force required is five times that required to slide the block down the plane. Both forces act parallel to the plane. What is the coefficient of friction between the block and the plane?
Answer» ANSWER :0.866