According to newton’s third law of motion, which are equal?
momentum and velocity
collision time and stop time
mass and momentum
action force and reaction force

Action force and reaction force

Explanation:

According to newton's third laws of motion, the action of a body is always associated with the reaction of the other body.

But these two forces don't act on the same body.

For example,

If a man hits on the wooden board with his fist, he exerts a certain amount of force on the surface of the board. Consider it as action force dented by 'Fa'.

The wooden board exerts a similar force that is equal in magnitude but in the direction opposite to the applied force on his fist. Consider it as action force dented by 'Fr'.

In both cases, the force is acting on different bodies. It is mathematically expressed as

                                  Fa = - Fr

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this