可汗学院:物理学

可汗学院:物理学

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矢量和标量的介绍的笔记

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Vectors which magitude/size and directions.

Scalers which only have the magitude/size.

Distance is the scalar quantity which have the distance without direction.

When talk about the movement, the change in position, and give its direction called displacement.

Time only has one direction.

Speed is only a scaler quantity which it doesn't have direction.

Speed with direction is a vector quantity which it called velocity.

If you are thinking about change in position and the direction that it is displacement, without the direction is distance.

 

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