jimmy asked in Science & MathematicsPhysics · 10 months ago

PHYSICS HW HELP?

What is the kinetic energy of a 62kg cyclist if she is moving if she is moving on her bicycle at 8.2 m/s?

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  • MyRank
    Lv 6
    9 months ago

    Given,

    Mass (m) = 62kg

    Speed (v) = 8.2m/sec

    Kinetic energy (K.E) = ?

    We know that:-

    Kinetic Energy (K.E) = ½mv²

    = ½ x 62kg x (8.2m/sec)²

    = 2084.44J

    ≈ 2084 J

    ∴ Kinetic Energy (K.E) = 2084J

  • 10 months ago

    Ek = 1/2 m v^2  and you should note that v^2 is just v * v

    so can you multiply 1/2 * 62 * 8.2 * 8.2  J?  Really?  Somehow I am dismayed at the question. Substituting numbers is easy and isn't physics.  I may be judgmental if I feel that is the best way of helping you to be better.  If you don't like my advice then you are in deep trouble.

  • Anonymous
    10 months ago

    KE = 1/2 * mass * speed^2

    Substitute and solve, easy calc.

  • 10 months ago

    Kinetic Energy in J if m is in kg and V is in m/s

    KE = ½mV²

    KE = ½62•8.2² = ____ J

    you have a calculator....

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