Final answer:
The question is related to Physics and involves calculating the average acceleration needed for an object to reach a final velocity from rest over a given period. This problem is typically found in a high school level physics curriculum.
Step-by-step explanation:
The question provided falls within the subject of Physics and seems appropriate for the High School level. The question relates to uniform acceleration, specifically how long it takes for a vehicle or object to reach a certain speed from rest given a constant acceleration. This concept is often introduced in high school physics courses, where students learn to apply the equations of motion.
Example:
If a velocity increases from 0 to 20 m/s in 10 s, the average acceleration is calculated by the formula:
a = (v - u) / t
where:
a = acceleration,
v = final velocity,
u = initial velocity, and
t = time
Here, u = 0 m/s (since it's from rest), v = 20 m/s, and t = 10 s. So:
a = (20 m/s - 0 m/s) / 10 s = 2 m/s².
The average acceleration is thus 2 m/s².