A car is traveling down a highway. It was moving with a velocity of 50m/s when the driver reads the speed limit and has to decelerate with a

Question

A car is traveling down a highway. It was moving with a velocity of 50m/s when the driver reads the speed limit and has to decelerate with an acceleration of -5m/s for 2 seconds. What is the momentum of this 500kg car after it decelerates?

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Diễm Thu 5 years 2021-08-18T03:52:42+00:00 1 Answers 30 views 0

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  1. sori
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    2021-08-18T03:54:18+00:00
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    Answer:

    20,000 kg m/s

    Explanation:

    Given:

    v₀ = 50 m/s

    a = -5 m/s²

    t = 2 s

    Find: v

    v = at + v₀

    v = (-5 m/s²) (2 s) + (50 m/s)

    v = 40 m/s

    p = mv

    p = (500 kg) (40 m/s)

    p = 20,000 kg m/s

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )