A car from the beginning was traveling at 27.8m/s when he stepped on the brakes and stopped. According to the DMV, this would leave a skid m

Question

A car from the beginning was traveling at 27.8m/s when he stepped on the brakes and stopped. According to the DMV, this would leave a skid mark of 60m. What is his acceleration?

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Thạch Thảo 3 years 2021-07-14T03:12:40+00:00 1 Answers 5 views 0

Answers ( )

  1. lethu
    0
    2021-07-14T03:14:38+00:00
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    Answer:

    -6.44 m/s²

    Explanation:

    Given:

    Δx = 60 m

    v₀ = 27.8 m/s

    v = 0 m/s

    Find: a

    v² = v₀² + 2aΔx

    (0 m/s)² = (27.8 m/s)² + 2a (60 m)

    a = -6.44 m/s²

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