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"Using Rubber Bands as Power" Motion and Force PPT Courseware 3
Use rubber bands as power
1. When we carry water, we feel the downward pull of the bucket on our hands; when we carry a schoolbag, we feel the downward pressure of the schoolbag on our shoulders. Objects have a ______ force, which is ______.
2. In the car experiment, the more paper clips there are, the more ______ the car moves.
3. In this experiment, the magnitude of the pulling force is related to ______.
4. In the experiment, the force that makes the car move is ______.
1. Objects have a downward force, and this force is ( ).
A. Pressure B. Buoyancy C. Gravity
2. In the cable car experiment, what provides the power for the small cable car is ( ).
A. Body B. Cable C. Gravity of the weight at one end of the cable
3. The direction of gravity is always ( ).
A. Up B. Left C. Down
4. When the weight pulling the trolley becomes heavier, the speed of the trolley movement ( ).
A. Faster B. Slower C. Not necessarily
Install the trolley
1. Connect the rubber band rings and fix one end to the frame and the other end to the axle.
2. Turn the wheel and let the rubber band wrap around the axle. Release your hand and the wheel will turn.
Think about it:
In order for the car to move forward, what direction should the rubber band wrap around the axle?
The relationship between the driving direction of the car and the winding direction of the rubber band
The rubber band winds back and the car moves forward;
The rubber band winds forward and the car moves backward.
When the direction of the rubber band is opposite to the direction of the car, the car will move forward.
experiment plan
1. You can wind different numbers of turns on the axis of the trolley for comparison experiments. Discuss determining the number of laps for the experiment.
2. Also note during the experiment: the cars are the same and the rubber bands are the same. The ground is equally smooth.
3. Corresponding marks can be made on the ground to compare their driving distances.
4. The distance traveled by the car refers to the distance between the front wheel of the car from the starting point to the end point.
1. A rubber band can be stretched infinitely. The longer it is stretched, the greater the elasticity it produces. ( )
2. A spring that is not stretched also has elasticity. ( )
3. The bent wood is also elastic. ( )
4. The distance traveled by the car is related to the number of turns of the rubber band ( )
5. When wrapping the rubber band, do not wrap it too tightly. ( )
6. The direction of the car's movement is forward, regardless of the direction of the rubber band. ( )
7. Our textbooks will also produce elasticity after deformation. ( )
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"Using Rubber Bands as Power" Motion and Force PPT Download:
"Using Rubber Bands as Power" Motion and Force PPT Download Part One Content: Collaboratively explore the installation of a car driven by a rubber band. The number of turns of the rubber band and the distance traveled by the car. How the force of the rubber band is generated. Experimental discovery 1. Car power Produced from rubber bands..
"Using Rubber Bands as Power" Motion and Force PPT:
"Using Rubber Bands as Power" Motion and Force PPT Part One: Installing a Car Driven by Rubber Bands Connect the rubber band rings and fix one end to the frame. Turn the wheel and wrap the other end of the rubber band around the axle. Release your hand from turning the wheel and the wheel will...
"Using Rubber Bands as Power" Motion and Force PPT Courseware 2:
"Using Rubber Bands as Power" Sports and Force PPT Courseware 2 Introducing a new lesson 1. When we carry water, we feel the downward pull of the bucket on our hands; when we carry a schoolbag, we feel the downward pressure of the schoolbag on our shoulders. Objects have a downward force, which is ______. 2. Making small...