Newton's Law of Motion
By: Schauntel Niehoff
Newton's 1st Law
- An object moving at a constant velocity keeps moving at that velocity unless a net force acts on it. (An object at rest stays at rest unless a net force acts on it)
- An object in motion continues to move in the same direction at the same speed until a force changes its direction.
- An object in motion will stay in motion until acted by an outside force
- Example: A soccer ball will not move until it is kicked
Newton's 2nd Law
Acceleration of an object is in the same direction that the net force is applied on the object
Force = mass x acceleration
The greater the force, the greater the acceleration
The mass of an object and the force applied to it affect acceleration
Acceleration of an object is in the same direction as the net force on the object, and that the acceleration equals the net force divided by the mass
Example: You have to push a heavy ball harder to get it to move as fast as a small ball
Newton's 3rd Law
- When an object exerts a force on a second object, the second object exerts a force on the first object that is equal in strength and in the opposite direction
- For every action there is an equal and opposite reaction
The greater the mass, greater the momentum
Action-reaction forces act on different objects and differ from balanced forces
Example: A fireman turns on his hose and is knocked backwards
Videos About the Laws of Motion
Newton's Law Of Inertia
Newton's Second Law of Motion
Newton's 3rd Law of Motion