In newtons 3rd law the forces

are equal and opposite but they

do not cancel each other why?

The action and reaction forces act on separate objects.

Explanation:

If you push a brick across a flat plane the action force is acting on the brick but the reaction force is acting on your hand.

In newtons 3rd law the forces are equal and opposite but they do not cancel each other why? It is a natural phenomenon in science, when a force opposes definitely another one will not go in the same direction.

Explanation:

Just like gramm's law in physics, like poles attracts while unlike poles repels one another. This is another proof that, equal and opposite reaction must be available in order to compliment each other