A puppy has 245 J of KE. It has a velocity of 7 m/s. What is it’s mass?​

Question

A puppy has 245 J of KE. It has a velocity of 7 m/s. What is it’s mass?​

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Hồng Cúc 3 months 2021-08-01T14:01:34+00:00 1 Answers 0 views 0

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  1. Ben
    0
    2021-08-01T14:03:22+00:00
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    Answer: 10kg

    Explanation:

    Given that:

    Kinetic energy of puppy = 245J

    Velocity of puppy = 7 m/s

    mass of puppy = ?

    Recall that kinetic energy is the energy possessed by a moving body. It is measured in joules, and depends on the mass and velocity of the moving body

    i.e K.E = 1/2 x mass x (velocity)^2

    245J = 1/2 x mass x (7 m/s)^2

    245 = 0.5 x mass x 49

    245 = 24.5 x mass

    Mass = 245/24.5

    Mass = 10kg

    Thus, the mass of the puppy is 10kg

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