Independent Principle of Forces - QS Study
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Independent principle of forces:

According to Newton’s second law of motion rate of change of momentum a body will be active along the direction of force. So, the momentum that exists along the direction of force will be changed with time only. Even in case of many forces effect of one force on the body will not be influenced by other forces. The characteristic or feature of the forces on a body is called the independent principle of forces or physical non-independence. The reaction originated by any independent force towards the force or forces of interaction which originated the mentioned independent force is null. The independent action or actions originated by the interaction have limits that depend on the minimum and maximum speed reached in the interaction.

What we have learnt from Newton’s second law of motion are:

(i) Acceleration of a body is proportional to the applied force on the body.

(ii) When the force does not act the body does not have acceleration retardation.

(iii) Direction of force is the direction of acceleration.

(iv) When force acts on a body it mines with acceleration.