Chantelle W.

asked • 10/05/15

What is the car's average acceleration?

A car accelerates from 23m/s to 7m/s in 4 seconds. What is the car's average acceleration?
Multiple Choice:
A) -4m/s^2
B) 5.75 m/s^2
C) 1.75m/s^2
D) 4 m/s^2
I know the answer is A) -4m/s^2. But, why? SHOW WORK

2 Answers By Expert Tutors


Kevin F. answered • 10/05/15

5 (5)

Need a tutor? So glad you asked!

Jacob W.

Not quite an average velocity problem. We actually have to divide by 4 (the time elapsed) not 2.
Also, -16/2= -8 , not -4.


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