What is the work done by gravity on a 4 kg ball a. as it goes from point B to point A? b. As it goes from point A to C? (h

Question

What is the work done by gravity on a 4 kg ball
a. as it goes from point B to point A?
b. As it goes from point A to C?
(horizontal distance between A and B is 8 m; between B and C is 3.2 m)

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RobertKer 1 year 2021-09-02T21:23:58+00:00 1 Answers 0 views 0

Answers ( )

  1. quangkhai
    0
    2021-09-02T21:25:47+00:00
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    Answer:

    a. Work done = 313.92 Joules

    b. Work done = 439.49 Joules

    Explanation:

    Work done = Force x distance

    Where: Force = mass x gravity

    Thus,

    Work done = Force x gravity x distance

    The earth’s acceleration to gravity = 9.81 m/[tex]s^{2}[/tex].

    a. The work done as it goes from B to A can be determined as;

    work done = 4 x 9.81 x 8

                      = 313.92 Joules

    b. The distance between A and C is the total horizontal distance covered from A to C.

    i.e 8 + 3.2 = 11.2 m

    The work done as the ball goes from point A to C can be determined as:

    work done = 4 x 9.81 x 11.2

                      = 439.488

    work done = 439.49 Joules

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