Question

The velocity of a car moving in a straight line increases from 8 m/s to 22 m/s in 7 seconds. What is the average acceleration of the car during this period?
Question 3 options:

A. 2.3 m/s^2


B. 2.8 m/s^2


C. 1.8 m/s^2


D. 2.0 m/s^2

Answer 1

Velocity is measured by (final velocity - initial velocity)/time taken, or simply put, change in velocity/time taken. Our original velocity was 8, and our final was 22.
With our information, subtract 22 by 8 and then divide by 7 (final - inital)/(time taken).
22-8 = 14
14/7 = 2.
Your average acceleration was 2.0 m/s^2.
The answer is D.) 
I hope this helps!