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NEWTON’S 1 ST LAW OF MOTION

NEWTON’S 1 ST LAW OF MOTION. Newton’s 1 st Law of Motion. An object at rest remains at rest, and an object in motion remains in motion at a constant speed and in a straight line unless acted on by an unbalanced force. Part 1: Objects at rest.

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NEWTON’S 1 ST LAW OF MOTION

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  1. NEWTON’S 1ST LAW OF MOTION

  2. Newton’s 1st Law of Motion • An object at rest remains at rest, and an object in motion remains in motion at a constant speed and in a straight line unless acted on by an unbalanced force.

  3. Part 1: Objects at rest • Objects that are not moving are at rest (chair on the floor) • Objects will stay at rest (not moving) unless they are acted on by an unbalanced force • Chair will not slide across the floor unless you push it

  4. Part 2: Objects in Motion • Objects will continue to move forever with the same velocity unless an unbalanced force acts on them

  5. According the Newton’s 1st law, an object in motion will stay in motion forever unless acted on by an unbalanced force. So, when you push a book across the table, it quickly stops. Why? • There is an unbalanced force acting on the book • FRICTION – makes it difficult to observe Newton’s 1st law

  6. Inertia • Inertia: is the tendency of all objects to resist any change in motion • Mass is a measure of inertia. An object that has a small mass has less inertia than an object that has a large mass. • So, changing the motion of an object that has a small mass is easier then changing the motion of an object that has a large mass.

  7. Newton’s First Law STORYTextbook pages 158-160 1.  Restate the first law of motion in your own words in less than four sentences 2. Create a story, starring YOU, where you are in a situation where you are experiencing the 1st Law of Motion. Include: • A description of the situation or scenario you are in • How the law is affecting you 3. Write one paragraph to answer: What would happen if the 1st law was NOT in your story? Why?

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