Question

A race car starts from rest and accelerates uniformly to 69 mph in 4.5 s.

Determine the acceleration of the car in units of m/s2
A. 0.0 m/s2
B. 0.15 m/s2
C. 4.9 m/s2
D. 6.9 m/s2

Answer 1

For this question we should apply
a = v^2 - u^2 by t
a = 69 - 0 by 4.5
a = 69 by 4.5
a = 15.33
a = 6.85 m/s^2

If the answer in option is near to answer then , you can mark it as correct.
.:. The acceleration is 6.9 m/s^2