cnfontenot cnfontenot

23-06-2015
Physics

Answered

A skier has an acceleration of 2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s? A. 3.4 s B. 7.2 s C. 15.5 s D. 0.14 s

Verified Answer :

recklessnoah17 recklessnoah17

23-06-2015

The correct answer is B. 7.2

I hope this helps!

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Hippalectryon Hippalectryon

23-06-2015

By definition, the speed is decreased by 2.5 m/s every second. Hence it will be null in \(\frac{18}{2.5}=7.2 s\). Answer B

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