Question

A professional driver raced 400 meters in 8.56 seconds. If the driver started at rest and had a constant acceleration throughout the race, What was the acceleration of the car?

Answer 1

10.92 m/s²

Step-by-step explanation:

Applying,

s = ut+at²/2.................... Equation 1

Where s = distance. u = initial velocity, t = time, a = acceleration.

From the question,

Given: s = 400 meters, t = 8.56 seconds, u = 0 meters/seconds (Starts from rest)

Substitute these values into equation 1

400 = 0(8.56)+a(8.56²)/2

400 = 73.2736a/2

73.2736a = 800

a = 800/73.2736

a = 10.92 m/s²