Instantaneous speed experiment

Experiment 2 Instantaneous speed

【Purpose requirement】

1. Use the limit method to measure the instantaneous speed;

2. In-depth understanding of the relationship between average speed and instantaneous speed;

3. It is used to process data by graph method (extrapolation) and least square method.

【Experimental Principle】

Instantaneous speed is an important physical concept. Study the instantaneous speed on the air track. Many physical experiments on the air track are related to the instantaneous speed. However, the instantaneous speed measured in these experiments is often not the instantaneous speed in the strict sense, but the average speed in a very short time (or very short distance).

【Instruments】

Serial number

equipment name

Model / Specification

Unit price (yuan)

Remarks

1

Air cushion guide

QG-P / 1.5 meters

3580

And experiment five

2

Digital chronograph

J0201-5C / 5 digit display

3

Gas source

QY-â…¡

4

U-shaped light barrier

Different width

5

Cushion

Different thickness

6

Vernier caliper

0 ～ 150mm, 0.02mm