Which of the following is NOT an example of acceleration?

A. a car going from 10 mi/hr to 20 mi/hr
B. a bicyclist turning around the corner
C. a car traveling north with its cruise control set
D. a car slowing down to stop at a stop sign

1 Answer
Feb 12, 2018

Only C.


Cases A. and D. are obviously acclerating (D is decelerating, which is only negative acceleration).

Case B is acceleration. Changing the direction of an object's trajectory requires acceleration.

Leaving case C. A car with it's cruise control set, traveling in a constant direction at a constant speed, is not accelerating.