"Lever" Simple Machinery PPT Courseware 3

Description

"Lever" Simple Machinery PPT Courseware 3

learning target:

1. Understand leverage and several concepts related to leverage

2. Be able to identify levers from common tools and simple machines;

3. Experience the scientific abstraction method through the process of drawing the lever diagram;

1. Leverage

1. Definition: A hard rod that can rotate around a fixed point under the action of force. This hard rod is a lever.

(The lever can be straight or curved)

2. Five elements of leverage

Fulcrum: The point around which the lever can rotate, represented by point O.

Momentum: the force F1 that causes the lever to rotate

Resistance: the force that prevents the lever from rotating F2

Power arm: the distance from the fulcrum to the power action line, represented by L1

Resistance arm: the distance from the fulcrum to the resistance line, represented by L2

1. Regarding leverage, which of the following statements is correct ( )

A. A lever is a straight, hard rod

B. The line connecting the fulcrum to the action point of the power is the power arm.

C. The moment arm is the distance from the fulcrum to the line of action of the force

D． The moment arm is the distance from the point of action of the force to the fulcrum

2. Steps for simple lever drawing

(1) Find the location of the fulcrum

(2) Determine the lines of action of power and resistance

(3) The vertical line from the fulcrum as the line of action of power and resistance

(4) Standard foot, fixed force arm

Summarize:

1. Leverage

Fulcrum: The point around which the lever rotates (point O)

Momentum: the force that causes the lever to rotate (F1)

Resistance: the force that prevents the lever from turning (F2)

Power arm: the distance from the fulcrum to the power action line (L1)

Resistance arm: the distance from the fulcrum to the resistance line (L2)

2. Five elements of leverage

3. Some explanations on the five elements of leverage

4. Simple drawing of leverage

Keywords: Simple Machine Teaching Courseware, Leverage Teaching Courseware, New People's Education Edition Physics PPT Courseware for 8th Grade Volume 2, 8th Grade Physics Slide Courseware Download, Simple Machinery PPT Courseware Download, Leverage PPT Courseware Download, .ppt format

For more information about the "Lever of Simple Machinery" PPT courseware, please click the "Lever of Simple Machinery ppt ppt" tab.

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File Info

Update Time: 2024-10-05

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

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