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30 December, 01:39

a motorcyclist sees a branch in the road and hits the brakes, slowing down at - 6.42 m/s. if it takes him 2.85 us to stop, what was his starting velocity

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  1. 30 December, 02:03
    0
    Acceleration: - 6.42 m/second squared. [ a ]

    Final Velocity: 0 m/s [ v ]

    Time: 2.85 s. [ t ]

    Initial / starting velocity:? [ u ]

    v = u + a x t

    By substituting above values,

    0 = u + - 6.42 x 2.85

    0 = u + (-18.297)

    0 = u - 18.297

    u = 18.297

    Starting velocity = 18.297 m/s
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