1. Mass per unit volume of a substance is called its density.

    Mass per unit volume of a substance is called its density.

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  2. One kilogram force is the force acting on a body of one kilogram due to the gravity. [1kgf = 1kg ×9.8 ms⁻²

    One kilogram force is the force acting on a body of one kilogram due to the gravity.
    [1kgf = 1kg ×9.8 ms⁻²

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  3. Mass of a body is the quantity of matter in it whereas its weight is equal to the force with which it is attracted towards the earth.

    Mass of a body is the quantity of matter in it whereas its weight is equal to the force with which it is attracted towards the earth.

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