Question

If a car can go from 0 to 60 mph in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50 mph

Answer 1

Answer:

87.5 mph

Explanation:

All you need to do is find the car's acceleration rate.

Acceleration = ending speed - starting speed divided by the time it takes.

The top equation is finding the car's acceleration rate and the bottom equation is finding the answer to the question.

$a=\frac{v_{2} - v_{1}}{t} = \frac{60-0}{8} = 7.5mph\\\\v_{2} = at + v_{1} = (7.5)(5) + 50 = 87.5$

Hope this helps! Good luck :)