Based on Newton's of motion, forces are interactions between objects.

Based on Newton's third law of motion, forces are interactions between objects. This law states that for every action, there is an equal and opposite reaction. This means that any force exerted on a body will create a force of equal magnitude but in the opposite direction on the object that exerted the first force.

Here are the steps to understand this:

1. Identify the two objects interacting. According to Newton's third law, there must be two objects in order to have a force because forces come in pairs.

2. Determine the action force. This is the force that is initially exerted. For example, if you push a wall, the force you apply to the wall is the action force.

3. Identify the reaction force. This is the force that is exerted in response to the action force. In the example above, the wall pushes back with an equal amount of force. This is the reaction force.

4. Note the direction of the forces. The action and reaction forces are in opposite directions. If the action force pushes to the right, the reaction force will push to the left.

5. Understand that these forces are simultaneous. The action and reaction forces occur at the same time. This is a key part of understanding Newton's third law.

6. Remember that the forces are equal. The action and reaction forces are always equal in magnitude. If you push a wall with 5N of force, the wall pushes back with 5N of force.

This is a basic understanding of how forces work according to Newton's third law of motion.