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"Drive the Car Like a Rocket" Motion and Force PPT Courseware 3
Use rubber bands as motivation
Objects such as rubber bands and springs can easily change their shape when acted upon by external forces. When their shape changes, they will generate a force to restore their original shape. This force is called ____.
When they return to their original shape, ____ disappears.
1. When an object changes shape, it produces a force to return to its original shape ( ).
A. Gravity B. Pressure C. Elasticity
2. Which of the following objects has elasticity ( ).
A. Stone B. Rubber band C. Opened bow
3. The power of the rubber band powered car is provided by ( ).
A. Wheel B. Body gravity C. Rubber band
4. To make the rubber band powered car move faster, the following methods are feasible ( ).
A. Increase the number of turns of the rubber band. B. Reduce the number of turns of the rubber band. C. Reduce the number of rubber bands.
5. The direction of the car's movement and the direction of the rubber band winding around the axle ( ).
A. Same B. Opposite C. Irrelevant
6. Within a certain limit, the more weights are hung on the lower end of the rubber band, the elastic force generated by the rubber band ( ).
A. The bigger B. The smaller C. No change
1. Fill in the blanks:
Fix the fully inflated balloon on the car, release the nozzle of the balloon, and the gas in the balloon will eject, thus generating a ( ) in the opposite direction to the ejection direction, pushing the car forward. This force that drives the car is called ( ).
2. Questions and Answers:
What do rockets fly on?
Rockets fly by the recoil generated by the jet's flames.
To make a stationary object move, the object must ( )
To make an object move faster, the object must ( )
To stop a moving object, you must move the object ( )
1. Fix the fully inflated ball on the trolley, release the nozzle of the balloon, and the gas in the balloon will spurt out, thus generating a ______ in the opposite direction to the spurt, pushing the trolley forward. The force that drives the car is called ______.
2. Aim the mouth of the balloon to the left and let go, then it will fly towards ______. Balloons move by the ______ of the air in the balloon.
3. Vehicles that rely on recoil to move include ______ and ______, and animals that rely on recoil to move include ______.
4. To make a stationary object move, the object must be ______.
5. To make an object move faster, it must ______ the object.
6. To stop a moving object, you must use ______ on the object.
1. Jet aircraft fly by recoil. ( )
2. The direction of the jet's jet is the direction of flight. ( )
3. The flight direction of the balloon is controlled by the direction of its jet. ( )
4. Insert a thin tube at the nozzle of the balloon to guide the direction of the gas ejection ( )
5. The "Shenzhou" 7 spacecraft was pushed into the sky by the recoil thrust of the rocket. ( )
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"Drive the car like a rocket" Motion and force PPT download:
"Drive the Car Like a Rocket" Motion and Force PPT Download Part One: Teaching Process 1. Balloon blowing competition; 2. Use balloons to drive the car; 3. Thinking about the motion of the car. Let go of the balloon. The balloon will move, but not in one direction, but...
"Drive the Car Like a Rocket" Motion and Force PPT:
"Drive the Car Like a Rocket" PPT on Motion and Force Part One: Can a Car Be Driven by a Balloon? Give it a try, inflate the balloon enough and release the nozzle of the balloon. Can the car move? Try to explain why the air from the balloon moves the car. balloon..
"Drive the Car Like a Rocket" Motion and Force PPT Courseware 2:
"Driving a car like a rocket" PPT courseware on motion and force 2 Do this, 1. Inflate the balloon, with the mouth of the balloon facing your palm, relax slowly and feel the gas ejected from the balloon 2. Inflate the balloon again, Turn the mouth of the balloon downward or to the left, then release your hands and watch the air...