An object traveling in a straight line undergoes acceleration when its speed changes. An object traveling in a uniform circular motion at a constant speed is also said to undergo acceleration because its direction is changing. The term "acceleration" generally refers to the change in instantaneous velocity.
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Answer:
D. all of these
Explanation:
An object traveling in a straight line undergoes acceleration when its speed changes. An object traveling in a uniform circular motion at a constant speed is also said to undergo acceleration because its direction is changing. The term "acceleration" generally refers to the change in instantaneous velocity.
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