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23 March, 07:49

Near the end of a marathon race, the first two runners are separated by a distance of 45.0 m. The front runner has a velocity of 3.50 m/s, and the second a velocity of 4.20 m/s. What is the velocity of the second runner relative to the first?

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  1. 23 March, 09:19
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    0.7 m/s

    Explanation:

    velocity of first runner = 3.5 m/s

    velocity of second runner = 4.20 m/s

    Both the runner are running in the same direction

    velocity of second runner with respect to first runner = velocity of second runner - velocity of first runner

    velocity of second runner with respect to first runner = 4.20 - 3.5 = 0.7 m/s
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