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16 September, 04:26

Ann is driving down a street at 63 km/h. Suddenly a child runs into the street. If it takes Ann 0.796 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m.

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  1. 16 September, 04:40
    0
    13.93 m

    Explanation:

    initial velocity, u = 63 km/h

    Convert km/h into m/s

    so, u = 63 km/h = 17.5 m/s

    reaction time, t = 0.796 s

    Distance traveled by Ann before slowing down = speed of Ann x reaction time

    = 17.5 x 0.796

    = 13.93 m

    Thus, the distance traveled by Ann before slowing down is 13.93 m.
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