A bicycle travels at 3 m/s over a displacement of 2 km. The rider then changes the bike’s speed instantaneously to a new constant velocity f

Question

A bicycle travels at 3 m/s over a displacement of 2 km. The rider then changes the bike’s speed instantaneously to a new constant velocity for the next 2 km. A. If the average velocity for the entire 4 km trip is 4 m/s, determine the average velocity of this bike in the last 2 km. (HInt: it isn’t 5 m/s)! B. How much time did the entire trip take?

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Kiệt Gia 6 months 2021-07-21T16:05:54+00:00 1 Answers 4 views 0

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    2021-07-21T16:07:17+00:00

    Answer:

    1000s

    Explanation:

    Let t1 be time for 2km in 3m/s

    t1= 2000/3

    And t2 in the next 2km

    t2= 2000/v.

    So finding the average velocity

    4000/t1+t2

    =4000/2000(1/3+ 1/v)

    V= 6m/s..

    For 9km distance in 6m/s

    The whole trip is 4m/s

    So total time

    4000/4=1000s

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