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Newton’s 3 Laws of
Motion Notes
Essential Question: How can you relate each law of motion to a real world example? Set up Cornell Notes on Page 43. Add an extension page. Isaac Newton • English Mathematician and scientist • 1643 – 1727 • Wrote about Motion, Gravity, Diffraction of Light, and Forces. • Laid the foundations for modern science Newton’s First Law – Law of Inertia u An object at rest will remain at rest unless acted on by an unbalanced force. u An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. u Inertia: The tendency for an object to stay at rest or keep moving in the same direction. Newton’s First Law – Law of Inertia u What Does This Mean? u There is a natural tendency of objects to keep on doing what they are doing. u All objects resist changes in their state of motion u In the absence of an unbalanced force, an object in motion will maintain this state of motion. Newton’s First Law – Law of Inertia • What h
to tihe otion n this is appened the umnbalanced skater in this this ppicture? icture? picture? force in Newton’s First Law – Law of Inertia u This law is the same reason why you should always wear your seatbelt. Newton’s Second Law – Law of Acceleration u Acceleration is produced when a force acts on a mass. u The greater the mass of the object, the greater the amount of force needed to accelerate the object. u Force = Mass x Acceleration Newton’s Second Law – Law of Acceleration u What Does This Mean? u The heavier objects require more force to move the same distance as lighter objects. Newton’s Second Law – Law of Acceleration Newton’s Third Law – Law of Action/Reaction u For every action there is an equal and opposite re-­‐action. Newton’s Third Law – Law of Action/Reaction u What Does This Mean? u For every force there is a reaction force that is equal in size, but opposite in direction. u Whenever an object pushes another object it gets pushed back in the opposite direction equally as hard. Newton’s Third Law – Law of Action/Reaction u The rocket’s action is to push down on the ground with the force of its engines. u The reaction is that the ground pushes the rocket upwards with an equal force. Newton’s Third Law – Law of Action/Reaction Quiz Time! Which aw snother tthat Which hat Which How What Who mllany aw is waas eays Lays xplains aws the of heavier o
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