Newton’s Laws of Motion Section 1-3 Newton’s Laws of Motion

Newton’s Laws of Motion Sir Issac Newton published a book called Principia He explained 3 laws of motion (even though he did not discover all of them)

Newton’s First Law of Motion States: An object at rest remains at rest and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force Newton’s 1st Law is sometimes called the law of Inertia Inertia- the tendency of objects to resist any changes of motion Object at rest- object that is not moving Object in motion- object that is moving Unbalanced force that acts on every moving object is friction

Newton’s Second Law of Motion States: The Acceleration of an object depends on the mass of the object and the amount of force applied Force= Mass X Acceleration Acceleration= Force Divided by Mass

Newton’s Third Law of Motion States: Whenever an object exerts a force on a second object exerts an equal and opposite force on the first All forces act in pairs

Momentum Is a Property of Moving Objects Momentum- property of a moving object that depends on the objects mass and velocity Law of Conservation of Momentum- any time 2 objects interact, they may exchange momentum, but the total amount of momentum stays the same This explains Newton’s 3rd Law of Motion