3. Automobile companies often test the safety of cars by putting them through crash tests to observe the integrity of the passenger compartm

Question

3. Automobile companies often test the safety of cars by putting them through crash tests to observe the integrity of the passenger compartment. If 1100kg car is sent toward a cement wall with a speed of15 m/s, an impact force of 185,000 N stops the car, how long does it take before the car is brought to a stop?​

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Thu Giang 4 years 2021-07-27T02:45:24+00:00 1 Answers 412 views 0

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  1. RuslanHeatt
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    2021-07-27T02:47:06+00:00
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    Answer:

    Time taken for car to stop = 0.89 seconds (Approx.)

    Explanation:

    Given:

    Mass of car = 1100 kg

    Speed of car = 15 m/s

    Impact force = 185,000 N

    Find:

    Time taken for car to stop

    Computation:

    Change in momentum of car = M(v) – M(u)

    Change in momentum of car = 1100(0) – 1100(15)

    Change in momentum of car = -16,500

    Time taken for car to stop = I Change in momentum of car I / Impact force

    Time taken for car to stop = I-16,500I / 185,000

    Time taken for car to stop = 0.89 seconds (Approx.)

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