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a car starts from rest and reaches 20 m/s in 5 seconds. The average acceleration of the car is?​

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687544

Answer: 4 m/s

Explanation: Acceleration is the rate at which somethings speed changes in a short period of time.  The car's speed started at 0 and went to 20 m/s, which was a change of 20 m/s. It did this in 5 seconds.  So the rate at which the speed changed was 20 m/s / 5 s = 4 m/s

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