The position of a ball rolling in a straight line is given by x = 2.0 - 3.6t + 1.7t2, where x is in meters and in seconds.
(a) What do the numbers 2.0, 3.6, and 1.7 refer to?
(b) What are the units of each of these numbers?
(c) Determine the position of the ball at t = 1.0 s, 2.0 s, and 3.0 s.
(d) What is the average velocity over the interval t = 1.0 s to t = 3.0 s?