1. In many car magazines, the acceleration of a car is given by the time taken for the car to reach 60 miles per hour (mph) starting from rest. In the SI system, the unit of acceleration is metres per second squared (m/s2), which is calculated by the change in speed in m/s divided by the time taken in s. Given: 1 inch = 0.0254 m (exact) 1 foot = 12 inches 1 mile = 5280 feet Show that if the time taken to accelerate from 0 to 60 mph is 8.55 seconds, its average acceleration is 3.14 m/s-. [3 marks] Obtain the mathematical function relating the average acceleration in m/s to the 0 to 60 mph time in seconds, i.e.: a = f(t) where: a is acceleration in m/s t is time taken, in seconds, to accelerate from 0 - 60 mph [2 marks]