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24 March, 17:50

How much work will it take to lift a 2-kg pair of hiking boots 2 meters off the

ground and onto a shelf in your closet?

O A. 2.45 J

OB. 4J

C. 39.2 J

D. 20 J

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Answers (1)
  1. 24 March, 21:29
    0
    Option C - 39.2 J

    Explanation:

    We are given that;

    Mass; m = 2 kg.

    Distance moved off the floor; d = 10 m.

    Acceleration due to gravity; g = 9.8 m/s².

    We want to find the work done.

    Now, the Formula for work done is given by;

    Work = Force * displacement.

    In this case, it's force of gravity to lift up the boots, thus;

    Formula for this force is;

    Force = mass x acceleration due to gravity

    Force = 2 * 9.8 = 19.2 N

    ∴ Work done = 19.6 * 2

    Work done = 39.2 J.

    Hence, the Work done to life the boot of 2 kg to a height of 2 m is 39.2 J.
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