Which of the following objects (A-D) are accelerating? A. an object at rest, B. an object in motion in a straight line at a constant speed, C. an object in motion in a straight line with increasing speed, D. an object moving in a circle at constant speed.
A) an object at rest only
B) All but an object at rest
C) an object in motion in a straight line with increasing speed only
D) an object in motion in a straight line with increasing speed and an object moving in a circle at constant speed.

Question

Quizplus · Accepted Answer

An object accelerates if its velocity changes. This includes changes in speed or direction. An object moving in a straight line with increasing speed is accelerating, and an object moving in a circle at constant speed is also accelerating due to the change in direction.

Which of the Following Objects (A-D) Are Accelerating? A