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A runner decreases his velocity from 20 m/s to 10 m/s in 2.0 s. What was his average acceleration?
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Answers ( )
Acceleration = change in velocity/change in time
So you should have (20-10)/(0-2)= -10/2 = -5
So your answer is -5
Answer: -5.0 m/s ^2
Explanation: