Friction
What is friction?What do you think friction is?Take an educational guess...
Educational Guess       ✴Friction   is a force that opposes motion.✴Makes    it difficult for an object to move across a  ...
Friction is everywhere!•   Friction is everywhere    Can you give me examples where I can find    friction?•   Let’s think...
Examples of Friction•   Humans being able to walk--we use friction    to move!    Sitting in a chair and not slide off the...
Examples of Friction•   We can keep our hands warm by RUBBING    them together fast.•   Let’s try this!!
Examples of Friction•   Cars stop by using breaks--which use    friction to stop the rotation of the wheels    Trains have...
Types of Friction?•   Rolling friction    Static friction•   Fluid friction    Sliding friction
Rolling Friction•   The resistance between two surfaces    Example:•   Tire rolled one way but the road was still
Static Friction•   Friction is between two surfaces that are not    moving past each other    Example:•   When the balloon...
Fluid Friction•   When an object is moving in liquid or gas    Example:    When you drink from a straw, the fluid    insid...
Sliding Friction•   The force that opposes the motion of two    surfaces that past each other    Example:•   When you go d...
Let’s look at a video!http://www.youtube.com/watch?v=Zlhyw8fU1hI
Today’s Activity...•   We are predicting and testing an    experiment!    Materials: toy cars, ramps, towels, masking    t...
Give up?Let’s begin the race!!
After Activity...Review        GameLets Review!
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New friction pp

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New friction pp

  1. 1. Friction
  2. 2. What is friction?What do you think friction is?Take an educational guess...
  3. 3. Educational Guess ✴Friction is a force that opposes motion.✴Makes it difficult for an object to move across a surface✴The action of one surface or object rubbing against another.
  4. 4. Friction is everywhere!• Friction is everywhere Can you give me examples where I can find friction?• Let’s think about it! Friction occurs every day in our daily lives
  5. 5. Examples of Friction• Humans being able to walk--we use friction to move! Sitting in a chair and not slide off the chair--friction keep us sitting in our seats• We can keep our hands warm by ______??
  6. 6. Examples of Friction• We can keep our hands warm by RUBBING them together fast.• Let’s try this!!
  7. 7. Examples of Friction• Cars stop by using breaks--which use friction to stop the rotation of the wheels Trains have steel wheels and run on steel tracks--which its weight and friction allows the wheel to turn• Car tires operate on the road--Why? Because of friction--tires rubbing the road creates friction.
  8. 8. Types of Friction?• Rolling friction Static friction• Fluid friction Sliding friction
  9. 9. Rolling Friction• The resistance between two surfaces Example:• Tire rolled one way but the road was still
  10. 10. Static Friction• Friction is between two surfaces that are not moving past each other Example:• When the balloon is rubbed on your hair...Static friction is created!
  11. 11. Fluid Friction• When an object is moving in liquid or gas Example: When you drink from a straw, the fluid inside the cup was forced to go through the straw...Why? Because GREATER FRICTION
  12. 12. Sliding Friction• The force that opposes the motion of two surfaces that past each other Example:• When you go down the slide, you create sliding friction
  13. 13. Let’s look at a video!http://www.youtube.com/watch?v=Zlhyw8fU1hI
  14. 14. Today’s Activity...• We are predicting and testing an experiment! Materials: toy cars, ramps, towels, masking tape, paper, pencils, stop watch (timer), and calculator.• The question is what are we going to do with these materials today? Let’s think about!
  15. 15. Give up?Let’s begin the race!!
  16. 16. After Activity...Review GameLets Review!

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