Sam is pulling a box up to the second story of his apartment via a string. The box weighs 16.5 kg and starts from rest on the ground. Sam is

Question

Sam is pulling a box up to the second story of his apartment via a string. The box weighs 16.5 kg and starts from rest on the ground. Sam is pulling so that the velocity of the box is increasing by 2.6 m/s every second.

How long until the box reaches a height of 13.2 m?

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Gia Bảo 4 years 2021-08-07T22:25:52+00:00 1 Answers 12 views 0

Answers ( )

  1. mocmien2
    0
    2021-08-07T22:27:02+00:00
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    Answer:

    3.19 s

    Explanation:

    We know,

    s = ut + ( 1/2 * a * t^2 )

    13.2 = 0*t + ( 1/2 * 2.6 * t^2 )

    t^2 = 13.2/1.3 = 10.1538

    t = 3.19

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