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OpenStudy (anonymous):
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the value of its centripetal acceleration at that point? A. the value for the centripetal acceleration is g downward B. the value for the centripetal acceleration is 0.5g downward C. the value for the centripetal acceleration is g upward D. the value for the centripetal acceleration is 2g upward
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