A racecar driver steps on the gas,changing his speed from 10 m/s to 30 m/s in 4 seconds.The acceleration of the racecar is _________.

Name: A racecar driver steps on the gas,changing his speed from 10 m/s to 30 m/s in 4 seconds.The acceleration of the racecar is _________.
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The Answer of A racecar driver steps on the gas,changing his speed from 10 m/s to 30 m/s in 4 seconds.The acceleration of the racecar is _________.

A Racecar Driver Steps on the Gas,changing His Speed from 10