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Newton’s First Law of Motion

Newton’s First Law of Motion. Galileo’s Law of Inertia. When the ball was released, it tended to come within a few centimeters of the original height at the other end What would happen to the ball if it was released and allowed to roll without friction?. Investigate. Galileo’s Law of Inertia.

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Newton’s First Law of Motion

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  1. Newton’s First Law of Motion

  2. Galileo’s Law of Inertia • When the ball was released, it tended to come within a few centimeters of the original height at the other end • What would happen to the ball if it was released and allowed to roll without friction?

  3. Investigate

  4. Galileo’s Law of Inertia • What would happen if there was an infinite amount of room for the ball to roll (on a flat track)?

  5. Vocabulary • Inertia – the natural tendency of an object to remain at rest or to remain moving with constant speed in a straight line • Force – a push or a pull

  6. Newton’s First Law of Motion • Isaac Newton used Galileo’s law of inertia as the basis for developing his law of motion

  7. Vocabulary • (Newton’s) First Law of Motion – in the absence of an unbalanced force, an object at rest remains at rest, and an object already in motion remains in motion with constant speed in a straight line path • Inertia – the natural tendency of an object to remain at rest or to remain moving with constant speed in a straight line • Force – a push or a pull

  8. Newton’s First Law of Motion • Object at rest stays at rest • Does this make sense? • Object in motion stays in motion • Does this make sense?

  9. Vocabulary • Mass – the amount of matter in an object; measured in grams (g); it is a measure of inertia • (Newton’s) First Law of Motion – in the absence of an unbalanced force, an object at rest remains at rest, and an object already in motion remains in motion with constant speed in a straight line path • Inertia – the natural tendency of an object to remain at rest or to remain moving with constant speed in a straight line • Force – a push or a pull

  10. Newton’s First Law of Motion • How does mass affect inertia?

  11. Running Starts • Why do some athletes use running starts? • ie. Javelin, pole vault

  12. Vocabulary • Speed – the change in distance per unit of time • Velocity – speed in a given direction • Acceleration – the change in velocity per unit of time • Mass – the amount of matter in an object; measured in grams (g); it is a measure of inertia • (Newton’s) First Law of Motion – in the absence of an unbalanced force, an object at rest remains at rest, and an object already in motion remains in motion with constant speed in a straight line path • Inertia – the natural tendency of an object to remain at rest or to remain moving with constant speed in a straight line • Force – a push or a pull

  13. Frames of Reference • Why is the frame of reference important? • “relative to”

  14. Frames of Reference Video • http://youtu.be/5oSrDrDLylw

  15. Vocabulary • Frame of Reference – a vantage point with respect to which position and motion may be described; “relative to” • Speed – the change in distance per unit of time • Velocity – speed in a given direction • Acceleration – the change in velocity per unit of time • Mass – the amount of matter in an object; measured in grams (g); it is a measure of inertia • (Newton’s) First Law of Motion – in the absence of an unbalanced force, an object at rest remains at rest, and an object already in motion remains in motion with constant speed in a straight line path • Inertia – the natural tendency of an object to remain at rest or to remain moving with constant speed in a straight line • Force – a push or a pull

  16. What Do You Think Now? • How do figure skaters keep moving across the ice at high speeds for long times while seeming to expend no effort? • Why does a soccer ball continue to roll across the field after it has been kicked?

  17. Claim and Evidence Claim:Lake Superior has frozen over and become a frictionless surface. If I place a note in a frictionless container, it will slide all the way to Toronto to my long lost twin. Evidence:

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