The acceleration of the truck is [tex]4.5 m/s^2[/tex]
Explanation:
The acceleration of an object is given by:
[tex]a=\frac{v-u}{t}[/tex]
where
v is the final velocity
u is the initial velocity
t is the time taken for the velocity to change from u to v
For the truck in this problem, we have:
u = 0 is the initial velocity
v = 90 m/s is the final velocity
t = 20 s is the time interval
Substituting, we find the acceleration:
[tex]a=\frac{90-0}{20}=4.5 m/s^2[/tex]
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