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PING FAI 發問於 科學及數學物理學 · 1 年前

According to F=ma, can the increase of acceleration lower the mass of a rigid body?

2 個解答

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  • Jenkin
    Lv 7
    1 年前
    最愛解答

    F=ma is a relational or cause-effect physical characteristic observation.

    It is not a material property formula.

    It meaning is:

    Force will cause a mass to accelerate

    OR

    An accelerating mass will generate Force

    Since the rigid body mass is determined/fixed by its physical property, it will not change just by acceleration, increase of acceleration will only increase the force it generate or excreted upon.

    The answer is No in "normal" acceleration.

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  • SC147
    Lv 6
    1 年前

    F=ma, can the increase of acceleration lower the mass of a rigid body?

    No, that is not the case !

    [ Note: the mass of a rigid body is always CONSTANT (物質不滅論) ]

    The application of this formula should be, as in the following eg. :-

    With the same force F,

    a steel ball of mass M running on a frictionless table can accererlate at x km/h ;

    a steel ball of a smaller mass m running on this table would have an accererlation > x km/h

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