1. A moving object with a mass of 8.8 kg has linear momentum of magnitude 13 kg mis. What is the kinetic energy of the object? a

Question

1. A moving object with a mass of 8.8 kg has linear momentum of magnitude 13 kg mis. What is the kinetic energy of
the object?
a) 19 )
b) 4.8
c) 9.63
d) 0.743
e) 38)

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Euphemia 4 years 2021-08-09T12:05:03+00:00 1 Answers 12 views 0

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  1. Sapo1
    0
    2021-08-09T12:06:48+00:00
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    Answer: Option C) 9.63 joules

    Explanation:

    Mass of object = 8.8kg

    Speed of object = ?

    Kinetic energy = ?

    Momentum of the object = 13 kgm/s

    Recall that momentum is a product of mass M and speed V of a moving object.

    Thus, Momentum = Mass x Speed

    13 kgm/s = 8.8kg x V

    V = (13kgm/s ➗ 8.8kg)

    V = 1.48 m/s

    Now, that the speed of the object is known, calculate its kinetic energy. And, its kinetic energy depends on its mass M and speed, V

    Thus, Kinetic energy = 1/2 x mv^2

    = 1/2 x 8.8kg x (1.48m/s)^2

    = 0.5 x 8.8kg x (1.48m/s)^2

    = 4.4 x (1.48m/s)^2

    = 9.63 joules

    Thus, the kinetic energy of the object is

    9.63 joules

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