If a resident accidentally causes a chunk of ice to fall from the roof, how fast would the ice be moving when it hits the ground? Neglect ai

Question

If a resident accidentally causes a chunk of ice to fall from the roof, how fast would the ice be moving when it hits the ground? Neglect air resistance.

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Thiên Thanh 6 months 2021-07-21T12:45:04+00:00 1 Answers 5 views 0

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  1. Adela
    0
    2021-07-21T12:46:44+00:00
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    Answer:

    v = √2gh

    v = 7 m / s

    Explanation:

    For this exercise we can use the law of conservation of energy

    starting point. In the roof

             Em₀ = U = m g h

    final point. On the floor

              Em_f = K = ½ m v²

     

    as there is no friction, the energy is conserved

              Em₀ = Em_f

              m g h = ½ m v²

              v = √2gh

    In the exercise the height of the ceiling is not indicated, but in general the height of the ceiling of a house is h = 2.5 m

             v = √ (2 9.8 2.5)

             v = 7 m / s

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