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Secondary IV • 4mo.
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how do i solve this it keeps saying that im doing it wrong?

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Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

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    Team Alloprof • 4mo.

    Thank you for your question!


    You must use the formula that calculates the total energy of an object, which includes both potential and kinetic energy:

    $$ E_m = E_p + E_k $$

    Legend:

    • Em: total mechanical energy

    • Ep: potential energy

    • Ek: kinetic energy


    $$ E_p = mgh $$

    Legend:

    • m: mass (kg)

    • g: gravitational constant (=9.81)

    • h: height (m)

    $$ E_k = \frac{1}{2}mv^2 $$

    Legend:

    • v: speed (m/s)


    This webpage of the Alloprof website explains potential and kinetic energy:


    Don't hesitate to ask for more help!

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