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September 30 , 2011

September 30 , 2011. Activity Return District’s Assessment. Unit Focus Chapter 10 ScienceLog Lesson 1 Explain homework Homework: Exploration 1 A Picture Puzzle. Target(s) : Identify forces as pushes or pulls exerted by one object (the agent) on another object (the receiver).

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September 30 , 2011

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  1. September 30, 2011 Activity • Return District’s Assessment. • Unit Focus • Chapter 10 ScienceLog • Lesson 1 • Explain homework Homework: • Exploration 1 A Picture Puzzle Target(s): • Identify forces as pushes or pulls exerted by one object (the agent) on another object (the receiver). • Infer what the effect of a force will be on the receiver, such as changing its shape or motion.

  2. Unit 4 Force and Motion - Focus • Why don’t we float away from the Earth? • Why is it harder to ride your bike over ice than over asphalt? • Why is it difficult to stop heavy things that are already in motion?

  3. Chapter 10 Understanding Forces - ScienceLog • What is mass? Is it the same thing as weight? • What is a force? What forces are at work in this picture? • Why does the sky diver fall to the Earth after she jumps out of the plane?

  4. Lesson 1 – Forces at Work • http://blog.creativethink.com/2009/05/best-falling-domino-video-of-2009.html

  5. Question • No. A force is a push or pull that one body exerts on another. • Can there be a force without some object exerting the force and some other object receiving the force?

  6. Question • Change the shape of an object (such as the sail) • Give motion to an object at rest (such as the sailboat) • Alter the speed or direction of an object in motion • Name some effects that forces have on objects.

  7. Question • Yes. One object can exert a force on another without direct contact. Kathleen lost her balance and fell over the side. The Earth exerted a gravitational force on Kathleen. • Is it possible for one object to exert a force on another object without ever touching it?

  8. Question • Example: The force of the wind on the boat is opposed by the frictional force of the boat against the water. When the two forces are balanced, the boat moves at a constant velocity. If the wind’s force is less than the water resistance, the boat will slow down. • Examine the story for pairs of opposing forces on the same object that work against each other.

  9. Describing Forces

  10. Describing Forces

  11. Describing Forces

  12. Describing Forces

  13. Homework Examples

  14. September 30, 2011 • Identify forces as pushes or pulls exerted by one object (the agent) on another object (the receiver). • Infer what the effect of a force will be on the receiver, such as changing its shape or motion. • Exploration 1 A Picture Puzzle Target(s) Homework

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