How to Calculate Constant Acceleration and Distance?

[Masq]

Homework Statement

Q1: A car accelerates uniformly from rest to a
speed of 79.7 mi/h in 9.01 s.
Find the constant acceleration (expressed
in m/s2) of the car. Answer in units of m/s2.


Q2: Find the distance (expressed in m) that the
car travels during this time. Answer in units
of m.

Homework Equations

Acceleration
Distance

The Attempt at a Solution

Q1:
79.7mi/h = 35.6m/s
35.6/9.01 = 3.95m/s2

Q2:
3.95/2 * 9.01 = 17.79m

 

[Rake-MC]

Q1 looks fine to me, Q2 though, what formulae did you use?

I would have used $$s = ut + \frac{1}{2} at^2$$

where s = displacement
u = initial velocity
t = time
a = acceleration

This is the same as what you've done except your t is not squared.