A wooden plank is raised at one end to an angle of 30 degree. A 2.0 kilogram box is located on the incline1.0 meter from the lower end and given a slight tap to overcome static friction. The coefficient of kinetic friction between the box and the plank is μk= 0.20 .
a) Calculate the rate of acceleration of the box and
b) Calculate the speed of the box at the bottom. Suppose that the initial speed of the box is zero.