Question

Even though the magnitudes of
action force and reaction force are
equal and their directions are
opposite, their effects do not get
cancelled​

Answer 1

Forces get cancelled when equal magnitude of force is applied on a single body from opposite directions but here , force is applied on two different objects and thus, it doesn't get cancelled out.

Answer 2

Answer:

i) When the point of the two equal and opposite forces is the same then these do cancel not.

ii) But when the point of action of the two equal and opposite forces force is different. Though it's located on the same body but separated by distance between the point of a action of the forces then these forces don't cancel out but rather produce a couple. Example closing a tap.

iii) But if they are on different bodies they cannot cancel out but rather produce motion for example the downward weight is cancelled by the normal for while the force of the sun on the sun do not cancel each other.