A point at which the whole mass of the b...

A point at which the whole mass of the body is supposed to be concentrated in order to studt the motion of an external force in accordance with Newton's laws of motion is

centre of gravity

centre of mass

the point on the surface

the end point of rod

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In accordance with Newton’s third law of motion -

Action and reaction never balance each other

For appearance of action and reaction, physical contact is not necessary

This law is applicable whether the bodies are at rest or they are in motion

All of these

`F=(dp)/(dt)`

`F=mv`

`F=mv^(2)`

`F=m^(2)v`

`F = (dp)/(dt)`,

`F = mv,`

`F = mv^2`

`F = m^2 v`