science

after 30s, a runner is spriting at 3m/s. But, 10s later, the runner is sprinting at 3.8m/s. What is the runner's acceleration during this time?

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  1. a=(V2-V1)/(T2-T1)=(3.8-3)/(40-30)=0.08m/s^2.

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  2. WHAT IS THE ANSWER DOES ANYONE HAVE ANY COMMON SENSE BECAUSE U 2 R DUMMM

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