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2 years ago

Hannah, who has a mass of 65 kg, is riding at 25 m/s in her sports car when she must suddenly swerve off the road to avoid

Physics

1 answer:

Annette [7]2 years ago

7 0

Hannah comes to a rest in t = 0.4 s, so her acceleration is

a = (0 - 25 m/s) / (0.4 s) = -62.5 m/s²

(that is, the acceleration points in the direction opposing her movement forward as she brakes)

Then the force exerted on her by the seatbelt has magnitude

F = (65 kg) (62.5 m/s²) = 4062.5 N ≈ 4063 N

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$\Delta s$ - Length of the incline, measured in meters.

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