"Measurement of Elasticity and Force" Motion and Force PPT Courseware 2

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"Measurement of Elasticity and Force" Motion and Force PPT Courseware 2

A spring dynamometer is a tool for measuring force. It is often called a spring balance in life.

unit of force

People are accustomed to using "gram" and "kilogram force" to express the magnitude of gravity and other forces in daily life.

The international unit of force is called Newton, or Newton for short, and is represented by "N".

1 Newton ≈ 100 grams of force

This name was named in honor of the great scientist Newton. Our country also uses Newton as the unit of force.

Observe and answer:

1. How many cows does each large grid represent?

2. How many cows does each small grid represent?

3. What is the maximum force that can be measured?

4. Can an object weighing 6 N be hung on the hook?

When using a spring dynamometer, please note:

1. Observe the maximum scale value and the minimum scale value on the scale plate of the spring scale.

2. Pick up the spring scale vertically and first check whether the pointer is pointing at the "0" position. Pull the hook back and forth a few times to check for friction.

3. The tensile force is exerted on the spring scale along the direction of the central axis of the spring.

4. When reading, the line of sight should be perpendicular to the scale line, and the reading should be taken after the pointer is stable.

Homemade spring dynamometer

1. Fixed spring or rubber band;

2. Mark the 0-mark line: hang the spring, let the spring or rubber band hang down freely, and mark the 0-mark line at the position pointed by the pointer;

3. Mark the maximum value;

4. Mark the graduation value: Divide the 0 scale line and the maximum measurement value into several equal parts according to needs and actual conditions, and mark each scale line and graduation value.

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Update Time: 2024-10-20

This template belongs to Physics courseware Beijing Normal University eighth grade physics volume 2 industry PPT template

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