Question

A car accelerates at 1.5 m/s2 for 3 seconds. If it starts at rest, what is the final speed of the car? (numeric answer only - no units)

Answer 1

We can use the motion formula:

$v=u+at$

Where

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time

Now, given,

a = 1.5

t = 3

u = 0 (starts at rest)

v = ???

We will substitute the values into the equation of motion and find the final velocity (final speed).

$\begin{gathered} v=u+at \\ v=0+(1.5)(3) \\ v=0+4.5 \\ v=4.5 \end{gathered}$

So the final speed is 4.5