Question
Asked Dec 17, 2019
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A car carrying a 75-kg test dummy crashes into a wall at 25m/s and is brought to rest in 0.1s. Show that the average force exerted by the seat belt on the dummy is 18,750N?

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Expert Answer

Step 1

Given,

            m=75kg

            v=25m/s

            t=0.1s

Step 2

The acceleration of the car is

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a =- 25m/s 0. 1s 250m/s?

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Step 3

The average force exerted ...

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F = ma =75.0kg x 250m/s? =18750N

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Science

Physics

Kinematics

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