Question

If the velocity of a moving car increases from nine m/s to 25 m/s in the span of five seconds, what is the average acceleration during this time period?

Responses

7.2 m/s²
0.31 m/s²
3.2 m/s²
5 m/s²

Answer 1

3.2 m/s^2

Using the first formula Vo=Vi+at, you can plug in the velocities and time to solve for acceleration.

25=9+5a
16=5a
a=3.2 m/s^2