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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

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
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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

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User Tibin Thomas
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2 Answers

4 votes

The correct answer is B. 7.2

I hope this helps!

answered
User Fsmv
by
8.1k points
5 votes
By definition, the speed is decreased by 2.5 m/s every second. Hence it will be null in
(18)/(2.5)=7.2 s. Answer B
answered
User Cyrf
by
8.6k points
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