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AP Physics 28 Online
OpenStudy (anonymous):

In order to qualify for the finals in a racing event, a race card must achieve an average speed of 276 km/h on a track with a total length of 1520m If a particular car covers the first half of the track at an average speed of 246km/h, what average speed must it have in the second half of the event in order to qualify? Answer in units of km/h

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