Superman needs to help a construction worker and lifts a 425 kg steel beam vertically upward a distance of 117 m. How much work does Superma

Question

Superman needs to help a construction worker and lifts a 425 kg steel beam vertically upward a distance of 117 m. How much work does Superman do on the beam if the beam accelerates upward at 1.8 m/s2? Neglect frictional forces. A. 4.0×105 J B. 3.4×105 J C. 5.8×105 J D. 4.9×105 J

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Sapo 3 years 2021-08-25T18:28:20+00:00 1 Answers 15 views 0

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  1. King
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    2021-08-25T18:29:53+00:00
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    Answer:

    Work done =  5.8 × 10⁵ J (Approx)

    Explanation:

    Given:

    Mass of the beam (m) = 425 kg

    Distance (s) = 117 m

    Acceleration (a) = 1.8 m/s²

    Find:

    Work done.

    Computation:

    ⇒ Work done = Force × Displacement

    ⇒ Work done = Mass (Acceleration + Acceleration  of gravity) × Displacement    

    ⇒ Work done = 425 (1.8 + 9.81) × 117        

    ⇒ Work done = 425 (11.61) × 117              

    ⇒ Work done = 577,307.25

    ⇒ Work done =  5.8 × 10⁵ J (Approx)

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