A 4.0-kg block is on an incline plane of 30 degrees angle withrespect to horizontal. a)What is the minimum coefficient of staticfriction (μs)min is need to prevent it fromsliding down? b) If the surface μs is 0.30, less than(μs)min now, how much force(F) is needed toapply to the block horizontally to prevent it from sliding down?c)If F is doubled, what’s the acceleration of the block up theincline? Assume the coefficient of kinetic friction is 0.25.
