A 1.6 Kg bird that is flying through the air has 220 J of kinetic energy. How fast is the bird flying? 20.5 m/s 19.4 m/s

Question

A 1.6 Kg bird that is flying through the air has 220 J of kinetic energy. How fast is the bird flying?

20.5 m/s
19.4 m/s
18.2 m/s
16.6 m/s
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Hải Đăng 2 months 2021-07-25T05:31:38+00:00 1 Answers 3 views 0

Answers ( )

    0
    2021-07-25T05:33:24+00:00

    Answer:

    v = 16.58 m/s

    Explanation:

    Given that,

    Mass of a bird, m = 1.6 kg

    Kinetic energy of the bird, K = 220 J

    We need to find the speed of the bird. The formula for the kinetic energy is given by :

    E=\dfrac{1}{2}mv^2

    Where

    v is the speed of the bird

    So,

    v=\sqrt{\dfrac{2E}{m}}

    Put all the values,

    v=\sqrt{\dfrac{2\times 220}{1.6}}\\\\v=16.58\ m/s

    So, the speed of the bird is equal to 16.58 m/s.

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