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

Description

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

learning target:

1. Know that mechanical energy consists of kinetic energy and gravitational potential energy, and know the influencing factors of kinetic energy and gravitational potential energy;

2. Understand that kinetic energy and gravitational potential energy can be converted into each other, and can explain related phenomena and applications;

Detection Preview 1

What is energy and what is kinetic energy? What does kinetic energy have to do with? What is gravitational potential energy and what is it related to? What is elastic potential energy and what is it related to?

1. Understanding "can"

1. If an object can do work, we say it has energy.

2. The more work an object can do, the more energy it has.

3. Unit of energy: joule (J)

Do the following objects have energy? Divide the test into three categories and state the basis for classification.

1. Steel balls rolling on a horizontal track

2. The bent springboard

3. Chandeliers on the ceiling

4. The bent bow

5. A tight spring

6. The heavy hammer being lifted high

7. Football rolling on the ground

8. Books on the desk

9. Cars driving on level roads

4. Understand the concepts of three types of energy: kinetic energy, gravitational potential energy, and elastic potential energy.

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

(2) The energy an object has due to being lifted high is called gravitational potential energy

(3) The energy an object possesses due to elastic deformation is called elastic potential energy.

2. Experimental research

1. Explore the influencing factors of kinetic energy

2. Explore the factors affecting the magnitude of gravitational potential energy

3. Explore the influencing factors of elastic potential energy

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 =______.

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: ______ has large kinetic energy.

②When a student is jogging or running fast: ______ has high kinetic energy.

1. What form of mechanical energy does each of the following objects have?

(1). Football rolling on the ground

(2), a stone on the top of the mountain

(3) A bow bent on the ground

(4). Planes flying forward in the sky

2. The amount of kinetic energy is determined by the _____ and _____ of the object, and the amount of gravitational potential energy is determined by the ____________ and _____________ of the object.

3. Regarding the concept of energy, which of the following statements is correct ( )

A. Objects with equal potential energy must be at the same height

B. Since the hanging object does no work, it cannot

C. Bullets flying in the air have the ability to do work, so they have the ability to

D. If an object has mechanical energy, then the object must have both kinetic energy and potential energy.

Assign homework and preview:

1.After class 2

2. Preview: What is internal energy, and what are the ways to change internal energy?

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For more information about the PPT courseware "Mechanical work and mechanical energy, understanding kinetic energy and potential energy", please click the "Mechanical work and mechanical energy ppt understanding kinetic energy and potential energy" ppt tag.

"Understanding Kinetic Energy and Potential Energy" Mechanical Work and Mechanical Energy PPT Courseware 2:

"Understanding Kinetic Energy and Potential Energy" Mechanical Work and Mechanical Energy PPT Courseware 2 1: What is energy? (a) A stretched bow can shoot out arrows (b) Waves hit the surfboard (c) The deformed springboard bounces the athlete up (d) The diver falls into the water and splashes 1. Objects can do things to the outside world..

File Info

Update Time: 2024-09-10

This template belongs to Physics courseware Guangdong and Shanghai Edition Ninth Grade Physics Volume 1 industry PPT template

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