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Understanding Newton's Laws of Motion and Inertia for Homework Review

For your homework due tomorrow, continue working on the Force Packet, specifically pages 1-4. Your tasks include taking notes on Newton's laws of motion. Ensure your desk is clear except for writing materials and update your Table of Contents. You'll need to copy a bolded sentence from page 51 of your textbook into your notebook and define inertia on the following page. Lastly, complete the "What Changes Motion" activity and reflect on how inertia relates to wearing a seatbelt in a moving car.

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Understanding Newton's Laws of Motion and Inertia for Homework Review

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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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