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2 September, 18:02

07. what is the velocity of a 500kg elevator that has 4000J of energy?

1) Givens & Unknown:

2) Formula:

3) Sub & Solve:

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Answers (1)
  1. 2 September, 20:02
    0
    v = 4 m/s

    Explanation:

    Given dа ta:

    Mass of elevator = 500 kg

    Energy = 4000 j

    Velocity = ?

    Solution:

    1/2 mv² = 4000 j

    1/2 (500 kg) v² = 4000 j

    v² = 4000 j*2 / 500 kg

    v² = 4000 kg. m²/s² * 2 / 500 kg

    v² = 8000 kg. m²/s² / 500 kg

    j = kg. m²/s²

    v² = 16 m²/s²

    v = 4 m/s
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