Answer:
1.5 m/s^2
Step-by-step explanation:
Acceleration (a) is calculated using the formula:
a = Δt / Δv
where:
- Δv is the change in velocity,
- Δt is the change in time.
In this case, the initial velocity (u) is 2 m/s, the final velocity (v) is 20 m/s, and the time (t) is 12 seconds.
Δv = v − u
Δv = 20 m/s − 2 m/s = 18 m/s
Δt = t = 12 s
Now, substitute these values into the formula:
a = Δt / Δv
a = 18 m/s / 12 s
a = 1.5 m/s^2
So, the acceleration of the van is 1.5 m/s^2.