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Acceleration = (change in speed) divided by (time for the change)

= (30 mile/hour) / (3 seconds) = (30 mile/hour x 5,280 feet/mile) / (3,600 sec/hour x 3 seconds)

= (30 x 5,280) / (3,600 x 3) = 14 and 2/3 feet per second2 = about 0.457 G

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Q: A race car driver speeds up from 60 miles per hour to 90 miles per hour in 3 seconds What was his acceleration in sec?
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A race car driver speeds up from 60 miles per hour to 90 miles per hour in 3 seconds what was her acceleration in mphsec?

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