A train was moving along east at 25 m/s, but brakes for 3 seconds, reducing its velocity to 13 m/s east. What was its displacem

Question

A train was moving along east at 25 m/s, but brakes for 3 seconds, reducing its velocity to 13 m/s east.
What was its displacement while braking?

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Thu Nguyệt 4 years 2021-07-17T08:34:22+00:00 1 Answers 16 views 0

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  1. taiduc
    0
    2021-07-17T08:36:16+00:00
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    Answer:

    57 m

    Explanation:

    Given:

    v₀ = 25 m/s

    v = 13 m/s

    t = 3 s

    FInd: Δx

    Δx = ½ (v + v₀) t

    Δx = ½ (13 m/s + 25 m/s) (3 s)

    Δx = 57 m

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