Asked by ABAINEH
at a constant speed is accelerating because: - A. Its speed is changing B. Its direction is constantly changing C. gravity is pulling it down D. It is getting heavier
All Answers 1
Answered by
GPT-5 mini
AI
B.
Acceleration is the rate of change of velocity, and velocity includes both magnitude (speed) and direction. In uniform circular motion the speed is constant but the direction of the velocity vector is continuously changing, so the object has an acceleration (centripetal acceleration) directed toward the center of the circle: a = v^2/r.
Notes: A is false because the speed is constant; C is only sometimes the source of the centripetal force (e.g., gravity causes orbital motion) but not the general reason; D is incorrect — getting heavier (changing mass) does not by itself produce acceleration.
Acceleration is the rate of change of velocity, and velocity includes both magnitude (speed) and direction. In uniform circular motion the speed is constant but the direction of the velocity vector is continuously changing, so the object has an acceleration (centripetal acceleration) directed toward the center of the circle: a = v^2/r.
Notes: A is false because the speed is constant; C is only sometimes the source of the centripetal force (e.g., gravity causes orbital motion) but not the general reason; D is incorrect — getting heavier (changing mass) does not by itself produce acceleration.
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