We can use the motion formula:
[tex]v=u+at[/tex]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).
[tex]\begin{gathered} v=u+at \\ v=0+(1.5)(3) \\ v=0+4.5 \\ v=4.5 \end{gathered}[/tex]So the final speed is 4.5
