If your car is going 19 m/s at the beginning of the block (250 meters long), and your acceleration is 3.9 m/s?, how fast are you going

Question

If your car is going 19 m/s at the beginning of the block (250 meters long), and your acceleration is 3.9
m/s?, how fast are you going at the end of the block?

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Calantha 3 months 2021-07-17T08:36:36+00:00 1 Answers 1 views 0

Answers ( )

    0
    2021-07-17T08:38:32+00:00

    Answer:

    48 m/s

    Explanation:

    Given:

    Δx = 250 m

    v₀ = 19 m/s

    a = 3.9 m/s²

    Find: v

    v² = v₀² + 2aΔx

    v² = (19 m/s)² + 2 (3.9 m/s²) (250 m)

    v ≈ 48 m/s

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