Sally says that the ball swung by her instructor above is traveling at a constan

Question

Sally says that the ball swung by her instructor above is traveling at a constant speed. Johnny says that's not the whole story. Which of the following statements is correct? A. Johnny says the all is constantly accelerating in a direction tangent to the circle B. Johnny says the ball is accelerating but only when she starts or stops swinging it. C. Johnny says the ball has a centrifugal acceleration radially away from the center. D. Johnny says the ball has centripetal acceleration toward the center but no tangential acceleration

Explanation / Answer

D. Johnny says the ball has centripetal acceleration toward the center but no tangential acceleration

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