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3 September, 14:42

A speeding bullet with a speed of 582 m/s has a kinetic energy of 34,000 J. What is its mass?

A. 0.255 Kg

B. 0.505 Kg

C. 1.05 Kg

D. 2.01 Kg

E. 0.201 Kg

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Answers (1)
  1. 3 September, 14:50
    0
    0.201kg

    Explanation:

    The formular for calculating kinetic energy is:

    Ke = 1/2 * mv2

    The values given are:

    Ke = 34000J

    V = 582m/s

    m=?

    34000 = 1/2 * m * 582 * 582

    34000 = 1/2 * m * 338724

    34000 = 169362m

    To find m, divide both sides by the coefficient of m which is 169362

    34000/169362 = 169362m/169362

    m = 0.201kg.

    Thus, the mass is 0.201kg.
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