| A | B |
|---|
| Newton's First Law of Motion | An object at rest remains at rest and and an object in motion remains in motion at a constant speed and in a straight line unless acted on by an unbalanced force. Also called the Law of Inertia. |
| Newton’s Second Law of Motion | The acceleration of an object depends on the mass of the object and the amount of force applied to it. Acceleration decreases as mass increases; acceleration increases as mass decreases. Acceleration increases as force increases; acceleration decreases as force decreases. The acceleration of an object is always in the same direction as the applied force. F = m x a |
| Newton’s Third Law of Motion | Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. (FOR EVERY ACTION THERE IS AN OPPOSITE BUT EQUAL REACTION.) |
| What is the formula for Newton's Second Law? | Force(N) = mass(kg) x acceleration (m/s/s) or F = m x a |
| What is another name for Newton's First Law? | The Law of Inertia |
| According to Newton's First Law, objects remain at rest or remain in motion until... | an unbalanced force acts upon them. |
| What is another name for Newton's Second Law? | The Law of Force |
| What is another name for Newton's Third Law? | The Law of Action and Reaction |
| According to Newton's Third Law, all forces occur in... | pairs (action and reaction). This occurs even when there is no motion. Ex: a book pushes down on a desk and the desk pushes back up on the book. Action/reaction forces in a pair do not act on the same object. If they did, then the net force would be zero and nothing would move. |
| Examples of action/reaction pairs | A rabbit jumps and his legs exert a force on the Earth and the Earth exerts a force back on the rabbit. |
