A crane lifts an l-bean to a height of 30 meters giving it a potential energy of 108,486). What is the mass of the I-beam?

Question

A crane lifts an l-bean to a height of 30 meters giving it a potential energy of 108,486). What is the mass of the I-beam?

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Jezebel 5 years 2021-08-19T19:05:42+00:00 1 Answers 268 views 0

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  1. linhdan
    0
    2021-08-19T19:07:18+00:00
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    369 kg

    Explanation:

    Step 1:

    We know that the expression for potential energy is

    PE = mgh

    where, m =Mass

                g = Acceleration due to gravity

                h Height

    Step 2:

    Here m = ?

             PE = 108486

             h = 30 m

              g = 9.8 ms⁻²

    108486 = 30 * 9.86 * m

    m= 108486 / (9.8*30) = 369 kg

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