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25 April, 21:57

A car advertisement states that a certain car can accelerate from rest to 20 m/s in 7 seconds. How far does this car go? What is the car's acceleration?

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  1. 25 April, 22:03
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    It's acceleration a = 20 / 7 = 2.857 ms^-2.

    Using the equation of motion under constant acceleration:

    Distance travelled = 1/2 * a * t^2

    = 1/2 * 2.857 * 7^2

    = 70.00 m (to the nearest hundredth).
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