In which direction does a Newton's third law reaction force act?

A. In the same direction as the action force

B. In the opposite direction from the action force

C. It depends on the situation

D. Perpendicular to the action force

The correct choice is B. In the opposite direction from the action force

Explanation:

According to Newtons 3rd law every action has a reaction which is equal in magnitude but opposite in the direction. The direction of the force on the first object is opposite to the direction of the force on the second object. In other words all forces between two objects exist in equal magnitude and opposite direction.

Mathematically

FA = - FB

Hello!

The answer is: B. In the opposite direction from the action force.

Why?

Newton's third law states that there is always a force acting in the opposite direction from the first applied force to an object, the second force will have the same magnitude but the opposite direction.

For example, when we sit on a chair, there is a force applied on the chair (our weight), at the same time, there is an equal force but with opposite direction going from the chair to us.

There are other two laws established by Newton, and they are related to the object's movement, acceleration, forces, masses, and velocity.

Have a nice day!