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5 July, 03:42

What is the gravitational force acting on a 70.0 kg object standing on the earth's surface?

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  1. 5 July, 03:56
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    G (gravitational acceleration) = - 9.81 m/s^2

    m (mass) = 70.0 kg

    According to Newton's second law of motion:

    "F=ma"

    Force is equal mass per acceleration therefore

    W=mg

    This is because weigth is the force of gravity acting in a body and "a" is replaced by "g" because "g"

    is gravitational acceleration

    Therefore:

    W = mg

    W = (70.0 kg) (-9.81m/s^2)

    W = - 686.7 N

    * The "N" means newton which is (kg * m/s^2)
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