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. all but an object at rest
B. an object in motion in a straight line with increasing speed only
C. an object at rest only
D. an object in motion in a straight line with increasing speed and an object moving in a circle at constant speed.
Answer: D
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