Car has a mass of 1525 kg. What is its kinetic energy if it has a speed of 107 km/h?

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  • 1 year ago

    Change v = 107 km/h to m/s

    (107*1000)/(60*60) = 535/18 or 29.722 m/s

    Kinetic energy = ½ mv2

    KE = ½ * 1525 * (535/18) 2

    KE = 673600 J

  • 1 year ago

    All our formulae work for SI units only

    Other units including Imperial, US, and "common" units require conversion factors or conversions.

    IN EVERY CASE you should consider converting to SI units first then and only then attempting the problem.

    In this situation 107 km -> 107000m

    and 1 hour -> 60 * 60 = 3600 s

    speed = distance / time = 107000/3600 m/s

    NOW you are ready to start the physics.

  • Zirp
    Lv 7
    1 year ago

    mv²

    express the speed in meters per second

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