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14 October, 03:35

Calculate the kinetic energy of a 64. g bullet moving at a speed of 411. ms. Round your answer to 2 significant digits.

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  1. 14 October, 03:57
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    The kinetic energy of the bullet is 5.4 * 10³ J

    Explanation:

    Hi there!

    The equation of kinetic energy is the following:

    KE = 1/2 · m · v²

    Where:

    KE = kinetic energy.

    m = mass of the bullet.

    v = speed of the bullet.

    Let's convert the mass unit to kg so that our result is in Joules:

    64 g · (1 kg / 1000 g) = 0.064 kg

    Then, the kinetic energy will be the following:

    KE = 1/2 · 0.064 kg · (411 m/s) ²

    KE = 5.4 * 10³ J
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