"Kinetic Energy and Potential Energy" Work and Mechanical Energy PPT Courseware 3

Description

"Kinetic Energy and Potential Energy" Work and Mechanical Energy PPT Courseware 3

learning target

1. Understand the preliminary concept of energy.

2. Understand the concepts of kinetic energy and potential energy through examples.

3. Understand what factors are related to the magnitude of kinetic energy and gravitational potential energy, and be able to explain simple phenomena.

Energy: If an object can do work on the outside, we say that the object has energy, or energy for short. The unit of energy is the same as the unit of work: Joule (J).

The process of an object doing work is the process of energy conversion. The more work an object does, the more energy it can convert into other forms.

Classroom training

1. Determine the changes in kinetic energy

① When a car accelerates, its kinetic energy _____.

② When the train decelerates when it enters the station, its kinetic energy is _____; after it stops, its kinetic energy is equal to _____.

③A sprinkler truck is moving forward at a constant speed on the road and spraying water. Its kinetic energy is _____.

2. Compare the kinetic energy

①The car moves forward at the same speed when empty and fully loaded: the kinetic energy is greater when _____.

②A classmate jogs and runs quickly: The kinetic energy is greater when _____.

The picture shows a scene of a highway. Please explain it from the perspective of kinetic energy:

(1) Why should the driving speed of motor vehicles be limited?

(2) Why do different models of vehicles have different speed limits on the same road?

Classroom training

A helicopter rising at a constant speed, its ( )

A. Kinetic energy increases while gravitational potential energy remains unchanged.

B. Kinetic energy remains unchanged and gravitational potential energy increases.

C. Both kinetic energy and gravitational potential energy increase

D. Both kinetic energy and gravitational potential energy remain unchanged

experience it

1. Pull the rubber band with your hands

2. Use a curved steel ruler to move the book

3. Use a homemade slingshot to shoot out the rubber block

What should be done to make the rubber block shoot farther?

What factors are related to elastic potential energy?

The size of the elastic potential energy is related to the size of the (elastic) deformation of the object. The greater the (elastic) deformation of the object, the greater the elastic potential energy.

All objects that undergo elastic deformation have elastic potential energy.

Class summary

1. Kinetic energy:

1. The energy an object possesses due to motion is called kinetic energy.

2. All moving objects have kinetic energy.

3. The greater the mass of the moving object, the greater the speed, and the greater the kinetic energy.

2. Potential energy:

1. The energy an object has due to being lifted up is called gravitational potential energy.

2. The greater the object's mass and the higher its position, the greater its gravitational potential energy.

3. The potential energy possessed by an object due to elastic deformation is called elastic potential energy.

The greater the elastic deformation of the object, the greater the elastic potential energy.

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For more information about the PPT courseware "Work and Mechanical Energy Kinetic Energy and Potential Energy", please click the Work and Mechanical Energy ppt Kinetic Energy and Potential Energy ppt tag.

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"Understanding Kinetic Energy and Potential Energy" Mechanical Work and Mechanical Energy PPT Courseware:

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"Kinetic Energy and Potential Energy" Work and Mechanical Energy PPT Courseware 6:

"Kinetic Energy and Potential Energy" Work and Mechanical Energy PPT Courseware 6 Lesson Objectives: Know what kinetic energy and potential energy are, understand what factors are related to the magnitude of kinetic energy and potential energy, and use the control variable method and conversion method to research problems... ... ... Explore: What factors are related to the size of kinetic energy? ..

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Update Time: 2024-11-22

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 2 industry PPT template

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