A Toy Train Moves with Uniform Speed on a Circular

question 18

Multiple Choice

A toy train moves with uniform speed on a circular track.Which of the following statements is true?

• A)The angular acceleration is always positive.
• B)The angular acceleration is always negative.
• C)The angular acceleration can either be positive or negative,depending if the train runs clockwise or counter-clockwise.
• D)The centripetal acceleration is 0.
• E)The centripetal acceleration does not change in magnitude.

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