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A new car is tested on a 240-m-diameter track. If the car speeds up at a steady 1.2m/s2 , how long after starting is the

A new car is tested on a 240-m-diameter track.

If the car speeds up at a steady 1.2m/s2 , how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration?

Express your answer to two significant figures and include the appropriate units.

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