PPT Slide
Finally, you should know Newton’s Laws by heart.
Understand them! Know how to apply them.
A net force causes a mass to
accelerate in the same direction as the net force.
Converse: If a system is accelerating, there is a net force.
If there is no net force, the velocity stays the same.
Converse: If the velocity stays the same, there is no net force.
A force always involves two objects interacting (A and B).
The force of A on B is equal in magnitude but opposite in direction
to the force of B on A. This is called a reaction force.
Reaction forces act on different objects so
should not appear on the same force diagram.