She starts from rest at a height h1 of 26.6 m. When she is partway down the slide, at a height h2 of 13.6 m, she is moving at a speed of 1.7

Question

She starts from rest at a height h1 of 26.6 m. When she is partway down the slide, at a height h2 of 13.6 m, she is moving at a speed of 1.70 m/s. Calculate the mechanical energy lost due to friction

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bonexptip 4 years 2021-09-05T12:13:09+00:00 2 Answers 22 views 0

Answers ( )

  1. sori
    0
    2021-09-05T12:15:02+00:00
    Reply

    Answer:

    the mass of the child is not given and the question is not complete

    but heres the solution.

    Using the law of conservation of energy

    Initial gravitational energy = work done by friction +  work done gained by kinetic energy

    mgh = w + 0.5mv^{2}

    w =29kg ×9.8m.s^{-2} ×13m – 0.5×29kg×1.70m.s^{-1}

    w =3669.95 J

    Explanation:

  2. linhdan
    0
    2021-09-05T12:15:06+00:00
    Reply

    Explanation:

    Below is an attachment containing the solution.

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