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When one body exerts a force on another body, the other body exerts an equal and opposite reaction force. Both bodies gain equal and opposite momentum due to the forces. The momentum gained by a body due to the action of a force on it a force is given by the integral of the force with respect to time over the time period that it acts. In less mathematical terms, the momentum gained is dependant on how the strength of the force changed over the time it acted and also how long it acted for.

How much the two bodies move as a result is dependant on their respective masses. If a body has momentum, p, and mass, m, then it's velocity, v, due to that momentum is given by

v=p/m,

so the larger a body's mass, the smaller its velocity for a given momentum and the smaller it's mass, the greater its velocity. If the two bodies have similar masses, they will move in opposite directions with similar speeds; For example, two billiard balls colliding. However if one body has a much larger mass, it will move much less than the smaller body. An example of this would be doing a pushup; You exert a force on the Earth and it exerts an equal and opposite reaction force on you. You both gain the same amount of momentum from the pushup but, because the Earth's mass is so much greater than yours, you move up a noticeable amount while the Earth barely moves down at all.

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Do action and reaction forces act on same body to produce some magnitude of motion?

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They can't. The vector sum of equal and opposite forces is zero, and they can't produce any acceleration at all.


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had that not been the case then the two forces would cancel each other as they act on the same body being equal and opposite


Why action and reaction forces produce motion explain?

Action and reaction forces produce motion because for every action force there is an equal and opposite reaction force, as stated by Newton's third law of motion. These forces act on different objects, causing them to accelerate in opposite directions, thus producing motion. When the forces are unbalanced, motion occurs due to the resulting acceleration.


When the forces on an object produce a net force of zero the forces are?

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