Equal and opposite
When two objects interact, there are always two forces. The forces are equal in size and opposite in direction. One force acts on one object and an equal and opposite force acts on the second object.
More than one force
The horse in the first diagram is pulling the tree trunk with a 1000 N force.
In the second diagram, two horses are pulling. Their forces are in the same direction so they add together. They have the same effect as if a single force equal to both the forces added together was acting.
Forces that balance
In this diagram, the horses pull with forces that are equal in size but in opposite directions.
The forces cancel each other out.
No comments:
Post a Comment