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26 December, 10:51

a 2000-kilogram car uses a breaking force of 12000 newton's to stop in 5 seconds. what impulse acts on the car?

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  1. 26 December, 11:19
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    i honestly don't even know but yahoo answers says:

    Impulse causes momentum to change, which means:

    Impulse = change in momentum, or in equation form:

    F∆t = (mv) 2 - (mv) 1

    so p (impulse) = mass times velocity so the mass is 2,000kg and the velocity is 12,000N/5s.

    speed is basically velocity so you have to calculate how many newtons per one second, so 12,000/5s- - just divide the numerator and denominator by 5. Also, velocity and speed are measured in N/s.
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