Newton's Three Laws

Melissa McFarland

Newton's First Law

The first law states that an object in motion will stay in motion, and an object at rest will stay at rest unless acted on by an outside force. This law is commonly known as a the law of inertia.

Example: You are in your car at a stop light When you accelerate a car from rest, the road provides an unbalanced force on the spinning wheels to push the car forward; yet the coffee (that was at rest) wants to stay at rest. While the car accelerates forward, the coffee remains in the same position and spills all over.

Newton's First Law

Newton's Second Law

The second law states that the relationship between an objects mass, acceleration, and the applied force. The formula for the second law is F=MA.


Examples: It is easier for a n adult to push an empty shopping cart than it is for a baby to push an empty shopping cart. The reason for this is because the adult can apply force greater than the mass of the shopping cart, but the baby is not able to exert enough force to move the mass of the shopping cart.

How in the World - "What in the World is Newton's Second Law of Motion?"

Newton's Third Law

The third law states that for every action there must be an equal and opposite reaction. This is one of the reasons that forces are always found in pairs.


Example: If you take a deflated balloon and blow it up so it is completely full of air and you let it go the balloon is going to be pushed forward. The reason the balloon goes forward is because the air rushes out of the lose end and which causes the balon to go forward.

Bill Nye and Newton's Third Law