A pendulum reaches a height of 0.3 m at the top of its swing. If the bob has a mass of 5 kg, what is the potential energy at the top o

Question

A pendulum reaches a height of 0.3 m at the top of its swing. If the
bob has a mass of 5 kg, what is the potential energy at the top of its
swing?
Select one:
14.7)
7.35 J
0.45 J
1.5 J

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Minh Khuê 3 years 2021-09-05T14:40:22+00:00 1 Answers 17 views 0

Answers ( )

  1. thachthao
    0
    2021-09-05T14:42:00+00:00
    Reply

    Answer: A

    Potential energy = 14.7 J

    Explanation:

    Given that the

    Mass M = 5 kg

    Height h = 0.3 m

    Let us take acceleration due to gravity g = 9.81 m/s^2

    Potential energy = mgh

    Substitute all the parameters into the formula above

    P.E = 5 × 9.81 × 0.3

    P.E = 14.715 J

    P.E = 14.7 J approximately

    The correct option is therefore A

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