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Mass of 55 kg riding in a car at20m/s slams on brakes rests in.5 sec how much force from seatbelt

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2,200 Newtons.

F = ma

v f = v i + at
0mls = 20mls + a(.5s)

-20mls/.5s = -40mls squared

-40mls squared (55kg) = 2,200 Newtons.

Hope this helps!
User KJTHoward
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