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Authoritative PPT Summary
"Mechanical Energy" Mechanical energy, internal energy and their transformation PPT courseware 6
1. Energy
If an object can do work on the outside, it means that the object has energy, or energy for short.
2. Kinetic energy
The energy an object possesses due to motion is called kinetic energy.
Explore: What factors are related to the size of kinetic energy?
in conclusion:
For an object with the same mass, the faster it moves, the greater its kinetic energy.
For objects moving at the same speed, the greater the mass, the greater the kinetic energy.
3. Gravitational potential energy: The energy an object has due to being lifted high.
4. Elastic potential energy: The energy possessed by an object due to its elastic deformation.
Explore: What factors are related to the magnitude of gravitational potential energy?
in conclusion:
For objects with the same mass, the higher they are lifted, the greater their gravitational potential energy;
For objects with the same height, the greater the mass, the greater the gravitational potential energy.
practice
1. What form of mechanical energy does the following object have:
The rocket lifted off: ______________ ;
Falling raindrops: ______________ ;
Stretched rubber band: ______________ .
2. An eagle with a larger mass and a swallow with a smaller mass fly in the air. If their kinetic energy is equal, then _____ flies faster.
3. There is a line in Tang poetry called "The endless Yangtze River rolls in". This moving line vividly and vividly reflects that this great river contains a lot of ______ energy.
4.—The object slides down the slope at a constant speed, and the object’s ( )
A. Kinetic energy increases, potential energy decreases
B． Kinetic energy and potential energy both decrease
C. Kinetic energy remains unchanged, potential energy decreases
D． Both kinetic energy and potential energy increase
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"Mechanical Energy" PPT (second lesson):
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"Mechanical Energy" PPT (first lesson):
"Mechanical Energy" PPT Part One Content: Teaching Objectives 1. Know the concept of kinetic energy and understand the two factors that affect the size of kinetic energy. 2. Know the concept of potential energy and understand the factors that affect the magnitude of gravitational potential energy and elastic potential energy. 3. Understand the concept of mechanical energy. 4. Take advantage of the machine..
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