Question

Does a real automobile have constant acceleration? Measured data for a Porsche 944 Turbo at maximum acceleration is as follows.
t(s)  v(mph)
0       0
2       28
4       46
6       60
8       70
10     78

(a) Convert the velocities to m/s, then make a graph of velocity versus time. Based on your graph, is the acceleration constant? Explain. (Your instructor may require you to hand in a separate sheet)

(b) Draw a smooth curve through the points on your graph, then use your graph to estimate the car's acceleration at 2.0 s and 8.0 s. Give your answer in SI units.(Hint: remember that acceleration is the slope of the velocity graph)