(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 8.0 m/s when going down a slope for 5.0 s? (b) How far does the skier travel in this time?

a. From Equation (1), the definition of average acceleration, the magnitude of the average acceleration of the skier is

b. With x representing the displacement traveled along the slope, From equation (2)