How many objects should be present for a force to come into play ?
Question
How many objects should be present for a force to come into play ?
Solution
For a force to come into play, at least two objects should be present. Here's why:
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Force is a vector quantity that is defined as an interaction that will change the motion of an object.
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This interaction is always between two objects. For example, if you push a wall, you are applying force on the wall and the wall is applying an equal and opposite force on you. This is according to Newton's third law of motion.
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Therefore, for a force to exist or come into play, there must be at least two objects involved - one to exert the force and the other to receive it.
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Even in the case of gravitational force, there are two objects involved - the object being attracted and the Earth (or any other celestial body exerting the force).
So, in conclusion, at least two objects should be present for a force to come into play.
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