Forces and change g2
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- 2. Ch.11, Lesson 2 Forces and Change What slows things down? Is a force that slows down moving things. It happens when 2 things rub together. Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 2 Friction
- 3. Ch.11, Lesson 2 Forces and Change There is more friction between rough surfaces than between smooth ones. It is harder to push or pull something over a rough surface than over a smooth one. Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 3
- 4. Ch.11, Lesson 2 Forces and Change When you skate, your wheels move along a surface. To stop, you drag a rubber stopper on the ground. You will slow down until you stop. Because dragging causes friction. Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 4
- 5. Ch.11, Lesson 2 Forces and Change What happens when you change a force? • When a force changes, the way a thing moves changes, too. • A little force can make a golf ball move slowly. • More force can make the golf ball move faster and farther. Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 5
- 6. Ch.11, Lesson 2 Forces and Change It takes more force to move heavy things than it does to move light things. Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 6
- 7. Ch.11, Lesson 2 Forces and Change How can force change motion? When something moves, it is in motion. A force can change the motion of things, it can make: object start moving. Moving object speeds up. Moving object slows down Moving object changes direction. Moving object stops moving Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 7
- 8. Ch.11, Lesson 2 Forces and Change Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 8
- 9. Ch.11, Lesson 2 Forces and Change When you play table tennis, you use a paddle to hit the ball across the net. Each hit is a push. The push changes the direction of the ball. The ball moves back and forth. Vocabulary: Friction Objectives: I will be able to know: 1-how surface can change the force on an object. 2-define and understand friction 3-understand how a force and direction of force can change. 9