Does an action-reaction force pair acts on the same body?

Answer 1

No, it acts on different bodies. If a body does a force on another body, the second body will exert a force with the same magnitude and opposite direction on the first body.

So for example, if you kick a football, you use a force on the ball, which causes the ball to accelerate and move. At the same time, the ball exerts an equal force on your foot, though the effect isn't quite the same as with the ball. (The reason you don't move yourself, is because the acceleration is also dependent on the mass of the body (F=m.a -> a=F/m). So the bigger the mass, the smaller the acceleration.)

The two forces from the example act on different bodies: the action force on the ball and the reaction force on your foot. This is very important to remember in exercices, because otherwise you'll assign forces to the wrong bodies!

I hope I helped you out a bit!

Answer 2

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.

Answer 3

The force acting on an object "A" from outside is action force , and the reaction force is the force exerted by A to the outside object .

Therefore, it is obvious that action force and the corresponding reaction force cannot act on one and the same body.

Answer 4

When action reaction forces are unbalanced, they produce motion.

Answer 5

An equal but opposite force will be exerted toward the first force.

Answer 6

both the forces act on same body

Answer 7

Simple answer: No