baedrian2668 baedrian2668

21-06-2019
Physics

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1400 kg car has a speed of 27 m/s. If it takes 7 s to stop the car, what is the Impulse and the average force acting on the car?

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MathPhys MathPhys

21-06-2019

Explanation:

Impulse is change in momentum:

I = Δp

I = (1400 kg) (27 m/s) - (1400 kg) (0 m/s)

I = 37800 kg m/s

Impulse is also average force times time:

I = F ΔT

37800 kg m/s = F (7 s)

F = 5400 N

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