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19 December, 22:30

stephanie, who has a mass of 75 kg is driving and suddenly slams on her brakes to avoid hitting a student crossing blanco road. she is wearing her seatbelt, which brings her body to a stop at 0.5 seconds. an average foce of 3750 N is exerted on her body during the collision. how fast was she going before applying the brakes?

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  1. 20 December, 00:56
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    25 m/s

    Explanation:

    Impulse = change in momentum

    F Δt = m Δv

    (3750 N) (0.5 s) = (75 kg) (v - 0 m/s)

    v = 25 m/s
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