A toy rocket, weighing mg=10 N, blasts straight up from a stadium of height (h) above the ground with a kinetic energy of 40 J. At the exac

Question

A toy rocket, weighing mg=10 N, blasts straight up from a stadium of height (h) above the ground with a kinetic energy of 40 J. At the exact top of its trajectory, the rocket has a total mechanical energy of 280 J. Find the height h of the stadium (ignore air resistance ).

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Xavia 5 years 2021-07-27T10:52:50+00:00 1 Answers 40 views 0

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  1. thongdat2
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    2021-07-27T10:53:57+00:00
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    Answer:

    Height of the stadium is 24 m

    Explanation:

    We have given weight of the rocket mg = 10 N

    Total mechanical energy is given = 280 J

    Kinetic energy is given Ke = 40 J

    We have to find the height of stadium

    Mechanical energy is the sum of potential energy and kinetic energy

    So potential energy is equal to = 280-40 =240 J

    So mgh=240

    10\times h=240

    h = 24 m

    So height of the stadium is 24 m

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