If the sports car in Exercise 20 can accelerate at a rate of \(7.2 \mathrm{~m} / \mathrm{s}^{2}\), how long does the car take to accelerate from 0 to \(60 \mathrm{mi} / \mathrm{h}\) ?
 Exercise 20
A sports car can accelerate from 0 to \(60 \mathrm{mi} / \mathrm{h}\) in \(3.9 \mathrm{~s}\). What is the magnitude of the average acceleration of the car in meters per second squared?