Doing work g3
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Work is done when a force causes a change in the motion of an object. Work requires energy, which exists in different forms like light, heat, sound, stored energy, and energy of motion. Energy can change from one form to another and move between objects. For example, stored chemical energy in food is converted to energy of motion when that food provides calories our bodies use to do work like lifting and carrying objects.
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Doing work g3
- 1. 1
- 2. Ch. 10 , Lesson 4 ( Doing Work ) Is done when a force changes the motion of an object. Ex. Picking up books is work: 1- You apply force 2-The motion of the books changes. 3-it takes work to move the books. Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 2 Work
- 4. Ch. 10 , Lesson 4 ( Doing Work ) No matter how hard you push, the wall does not change. Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 4
- 5. Ch. 10 , Lesson 4 ( Doing Work ) Who is doing Work? Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 5
- 6. Ch. 10 , Lesson 4 ( Doing Work ) To do work you need Energy The ability to do work. Energy exists in different forms light Heat Sound Electricity Stored Energy Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 6 Energy Energy Energy of motion
- 7. Ch. 10 , Lesson 4 ( Doing Work ) Energy of motion: Moving things has energy of motion. Stored energy: Energy that can make an object move. Ex. A ball at the top of hill has stored energy , it can fall down. Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 7
- 8. Ch. 10 , Lesson 4 ( Doing Work ) Other examples of stored energy: Fuels batteries food Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 8
- 9. Ch. 10 , Lesson 4 ( Doing Work ) Different food store different amounts of energy. The energy in food is measured in calories. Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 9
- 10. Ch. 10 , Lesson 4 ( Doing Work ) How does energy changes? Energy can change from one form to another: Stored energy energy of motion Friction Heat Energy can move from one object to another. Vocabulary: Work Energy Objectives: I will be able to know: How energy changes. 10
- 11. Ch. 10 , Lesson 4 ( Doing Work ) Check for understanding: 1-give 5 examples of work. 2-what is energy? 3-how does energy change? 4-what energy change takes place when you hold a heavy box? Vocabulary: Work Energy Objectives: I will be able to know: Work happens when there is change in motion 11
- 12. When work is done Activity Work Thinking about a math problem Turning a jump rope Holding a puppy Lifting a puppy Pulling on a locked door Opening an unlocked door Trying to scoop rock-hard ice cream