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Answer to Question #38384 in Mechanics | Relativity for Aly

Question #38384
If a point on a bike is momentarily in contact with the ground at a constant speed, what would the direction of acceleration for this point be?
Expert's answer
When an object is executing such a motion where it changes direction, but not speed, it is said to be undergoing centripetal (directed towards the center) acceleration. a_centripetal is always directed towards the axis of rotation, in this case, direction of acceleration for this point is upward.

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