Sir Isaac Newton Laws of Motion Physical Science

Sir Isaac Newton l 1. Described 3 laws that relate forces to motion l

Vocabulary l l l 1. Friction- a force that opposes motion between 2 objects

Mass l l l Measure of the amount of matter in an object The

Weight l l Weight is the measure of gravity on an object Weight of

Formula l l l Weight(W) = mass(m) x gravity(g) W = mg Example: Calculate

Newton’s 1 st Law of Motion “Law of Inertia” l An object at rest

Examples of Newton’s 1 st Law of Motion l l l 1. Car suddenly

Newton’s Second Law of Motion l The acceleration of an object depends on the

Newton’s Second Law of Motion l l l 1. Force- a push or pull,

Newton’s Third Law of Motion l 1. For every force, there is an equal

Examples of Newton’s 3 rd Law l 1. 2 cars hit head on l

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Sir Isaac Newton Laws of Motion Physical Science Mrs. Ishmael

Sir Isaac Newton l 1. Described 3 laws that relate forces to motion l 2. Force-a push or a pull, all forces have size and direction

Vocabulary l l l 1. Friction- a force that opposes motion between 2 objects that are touching 2. Inertia-tendency of all objects to stay at rest or in motion 3. Mass- the amount of matter an object is made of 4. Weight- is the force of gravity on an object 5. Equilibrium- a state in which opposite forces are balanced

Mass l l l Measure of the amount of matter in an object The mass of an object DOES NOT change when it moves from place to place Mass is measured in grams (g)

Example of Mass

Weight l l Weight is the measure of gravity on an object Weight of an object CHANGES depending on where you are Weight is measured in Newtons (N) Gravity on Earth is 9. 8 N/kg

Formula l l l Weight(W) = mass(m) x gravity(g) W = mg Example: Calculate the weight of a 5. 0 kg backpack on Earth? W = (5. 0 kg) (9. 8 N/kg) W = 49 N

Newton’s 1 st Law of Motion “Law of Inertia” l 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

Examples of Newton’s 1 st Law of Motion l l l 1. Car suddenly stops and you strain against the seat belt 2. Car turns left and you appear to slide to the right 3. The difficulty of pushing a car that won’t start

Examples of Newton’s 1 st Law of Motion

Newton’s Second Law of Motion l The acceleration of an object depends on the mass of the object and the amount of the force applied

Newton’s Second Law of Motion l l l 1. Force- a push or pull, all forces have size and direction 2. Mass- the amount of matter an object is made of 3. Acceleration-the rate at which velocity changes; and object accelerates if its speed changes, if its direction changes and if both speed and direction changes

Formula l

Examples of Newton’s 2 nd Law

Newton’s Third Law of Motion l 1. For every force, there is an equal and opposite force l 2. Action and Reaction

Examples of Newton’s 3 rd Law l 1. 2 cars hit head on l 2. Jumping out of a boat onto a dock l 3. Astronauts in space

Example