Question

If a car accelerates from rest to 27 m/s to 2.9 seconds, what is the average
acceleration?

Answer 1

`a_a_v_g=9.31m/s^2`

Step-by-step explanation:

To find the average acceleration, we just need the initial velocity of the body, the final velocity of the body, and the time interval it took to reach that final velocity from the initial velocity as a starting point.

Here we have:

Initial velocity
`u=0` (body starts from rest)

Final Velocity
`v_f=27`

time
`t=2.9\\`

so, we can find the average acceleration using the following formula:

`a_a_v_g=(v_f-u)/(t) =(27-0)/(2.9)=9.31 m/s^2`