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## Homework Statement

An airplane maintains a constant acceleration of 4.0m/s^2 as it speeds up from 16m/s [E] to 28 m/s [E].

A what is the average velocity?

b) how long does the airplane accelerate?

c) when is the instantaneous velocity equal to the average velocity for the interval?

a= 4.0 m/s^2

vi= 16m/s [E]

vf= 28m/s[E]

## Homework Equations

## The Attempt at a Solution

i found the answer to A and B

Average velocity = 22 m/s. Total time = 3.0 s

I don't know how instantaneous velocity is related to average velocity for the interval. Or how to find the answer. Someone help me?

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