Question

A drag race goes from zero to280[mi/h] within 7 [s] what is its acceleration during this period?

Answer 1

First things first, convert your mi/h into m/s (I don't really feel like explaining it, so I'll just give you the answer :D) 280mi/h is 125.17m/s
\[A=(Vf-Vi)/t\]

A is what you're trying to find. Vf is your final veloctiy, so 125.17. Subtract your initial velocity (Vi), giving you 125.17 again. Then you divide by your t, which is 7s.

If I did my math right, your acceleration should be 17.89m/s^2