A car can accelerate from 0 to 60 mph in 15 seconds. What is its acceleration?

Expert Answers info

Rico Grant eNotes educator | Certified Educator

calendarEducator since 2011

write3,036 answers

starTop subjects are Math, Science, and Business

Acceleration is the rate of change of the velocity per unit time.

We are given that the velocity changes from 0mph to 60mph in 15 seconds. To find the average rate of change, take the difference in the velocities divided by the difference in time.

(`Delta v` is the change in velocity and `Delta t` is the...

(The entire section contains 148 words.)

Unlock This Answer Now

check Approved by eNotes Editorial

aszerdi | Student

Acceleration is equivalent to the change in velocity over the change in time. In this problem, the units must be converted to feet per second.

60  *  ` ``m/h`  *  5280` ` `ft/m` *  `1/3600` `h/s` = 88 `ft/s`

The units for miles and hours will cancel out leaving feet per second. 60 miles per hour is equivalent to 88 feet per second.

Now this value is taken over time to find the acceleration:

88`ft/s` `/` 15s =  88`ft/s` *` `` `` ` `1/15` * `1/s` = 5.867 feet per second squared.

Ask a Question