an object is +2 m from the reference point. the object starts from rest it travels for 3 seconds and has a final position of -16 m. what is

Question

an object is +2 m from the reference point. the object starts from rest it travels for 3 seconds and has a final position of -16 m. what is the acceleration of the object?

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Khải Quang 4 years 2021-08-05T17:18:33+00:00 1 Answers 12 views 0

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  1. kiet
    0
    2021-08-05T17:19:54+00:00
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    Answer:

    Solution

    Given:

    initial velocity (u)=0m/s (because an object

    starts from the rest)

    time (t)=3sec

    diatance travelled(s)=14m(16-2=14)

    acceleration (a)=?

    Now,

    According to the formula

    s=ut+1/2at^2

    or,14 =0×3+1/2×a×3^2

    or, 14=0+a/2×9

    or, 14=9a/2

    or, 9a=28

    or, a=28/9

    or, a=3.1 m/s^2

    Therefore, the acceleration of the object is 3.1m/s^2 ans.

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