A motorcycle sees a branch in the road, and hits the brakes, slowing down at -6.42m/s^2. If it takes him 2.85s to stop, what was his startin

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A motorcycle sees a branch in the road, and hits the brakes, slowing down at -6.42m/s^2. If it takes him 2.85s to stop, what was his starting velocity

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Sapo 7 months 2021-07-29T20:36:58+00:00 1 Answers 14 views 0

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    2021-07-29T20:38:41+00:00

    Answer:

    The initial velocity of the motorcycle is 18.29 m/s.

    Explanation:

    Given that,

    When a motorcycle hits the brakes, its final speed becomes zero.

    Acceleration of the motorcycle, a=-6.42\ m/s^2

    Time taken to stop, t = 2.85 s

    We need to find the initial velocity of the motorcycle. The first equation of kinematics is given by :

    v=u+at\\\\-u=at\\\\u=6.42\times 2.85\\\\u=18.29\ m/s

    So, the initial velocity of the motorcycle is 18.29 m/s.

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