A runner covers the last straight stretch of a race in 3 s. During that time, he speeds up from 5 m/s to 11 m/s.What is the runner’s acceler

Question

A runner covers the last straight stretch of a race in 3 s. During that time, he speeds up from 5 m/s to 11 m/s.What is the runner’s acceleration in this part of the race? ​

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Amity 5 years 2021-07-18T07:09:15+00:00 1 Answers 22 views 0

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  1. King
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    2021-07-18T07:10:25+00:00
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    Answer:

    From first Newton’s equation of motion:

    { \bf{v = u + at}}

    Substitute the variables:

    { \tt{11 = 5 + (a \times 3)}} \\ { \tt{3a = 6}} \\ { \tt{a = 2 \: {ms}^{ - 2} }}

    Acceleration is 2 ms-²

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