Which of the following represents a case in which you are not accelerating?
A) Driving in a straight line at 60 miles per hour
B) Going from 0 to 60 miles per hour in 10 seconds
C) Slamming on the brakes to come to a stop at a stop sign
D) Driving 60 miles per hour around a curve

Question

Quizplus · Accepted Answer

Acceleration is defined as a change in velocity over time. Velocity is a vector quantity that includes both speed and direction. Therefore, if you are traveling in a straight line at a constant speed (such as 60 miles per hour), you are not accelerating because your velocity is not changing. Choice B involves a change in velocity and therefore represents acceleration. Choice C involves deceleration, which is a form of acceleration in which velocity decreases. Choice D involves changing direction, which also represents acceleration.

Which of the Following Represents a Case in Which You