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March 31, 2014

March 31, 2014. Homework : Continue working on Force Packet, pages 1-4 are due tomorrow for check-in Do Now: Write down your homework Clear your desks except for something to write with. Once done Check-in…. Update TOC : P g . 11 Forces on Sky Diver (Activity from Friday)

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March 31, 2014

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  1. March 31, 2014 Homework: • Continue working on Force Packet, pages 1-4 are due tomorrow for check-in Do Now: • Write down your homework • Clear your desks except for something to write with.

  2. Once done Check-in… Update TOC: • Pg. 11 Forces on Sky Diver (Activity from Friday) • Pg. 12 Friction and Gravity Check-in • Pg. 13- Newton's Laws- The Big 3 • Open textbook to pg. 51 • Write the bolded sentence from that page in your Notebook on pg. 13-- Newton’s first law of motion states… • Skip a space and define Inertia.. Found on the next page (52)

  3. Sir Isaac Newton A Main Man of Science and Mathematics

  4. Newton’s Big 3 Newton’s Three Law’s of Motion: 1st: Law of Inertia, objects at rest will stay at rest, objects in motion will stay in motion-unless an unbalanced force acts on the object 2nd: The force needed to move an object is equal to the product of that objects mass and acceleration; F= m x a 3rd: For every action there is an equal and opposite reaction.

  5. Newton’s First Law- Law of Inertia 1st: Objects that are at rest, stay at rest. --Objects that are in motion will stay in motion at constant velocity (speed) --unless an unbalanced force acts on it, which accelerates the object. (Speeds it up, Slows it down, or changes its direction) If already moving-- If no unbalanced forces act on the object---including friction– An object in motion will stay in motion http://science.howstuffworks.com/innovation/scientific-experiments/newton-law-of-motion1.htm

  6. Newton’s 1st Law • Inertia: the tendency of an object to resist a change in motion • The amount of inertia an object has depends on the mass of the object. • The greater the mass the greater the inertia---(resistance to motion) • Ex: An empty book bag verses a book bag full of books.

  7. What Changes Motion- Activity • Complete steps 1-3- in Nb. On pg. 13. 1) Place the white eraser on top of a toy car 2) One person stand your textbook up about a foot away from the car on top of your desk 3) Predict what will happen to both the car and the eraser if you roll the car into the book- record prediction on pg. 13 4) Test your prediction- gently roll the car into the book- answer the Think it Over questions In your note

  8. Discovery activity results What might be the reason for any difference between the motions of the car and the washers? - The book exerted a force on the car that caused it to stop, but the book did not exert a force on the eraser, so it continued moving..

  9. How does inertia explain why you should wear your seat beat in a moving car?

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