If you slide down a rope, it’s possible to create enough thermal energy to burn your hands or your legs where they grip the rope. Suppose a

Question

If you slide down a rope, it’s possible to create enough thermal energy to burn your hands or your legs where they grip the rope. Suppose a 30 kg child slides down a rope at a playground, descending 2.5 m at a constant speed.
How much thermal energy is created as she slides down the rope?

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Diễm Thu 5 months 2021-08-25T11:40:00+00:00 1 Answers 12 views 0

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  1. giabao
    0
    2021-08-25T11:41:57+00:00
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    Answer:

        Q = 735 J

    Explanation:

    In this exercise we must assume that all the mechanical energy of the system transforms into cemite energy.

    Initial energy

            Em₀ = U = m g h

    final energy

            Em_{f} = Q

            Em₀ = Em_{f}

            m g h = Q

    let’s calculate

            Q = 30  9.8  2.5

            Q = 735 J

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