# Distance and Displacement

### Distance

Definition
The distance traveled by an object is the total length that is traveled by that object.

SI unit: meter (m)
Quantity: Scalar

### Displacement

Definition
Displacement of an object from a point of reference, O is the shortest distance of the object from point O in a specific direction.

SI unit: meter (m)
Quantity: Vector

Example:

The distance of point B from the origin O is 100m.
The distance of point A from the origin O is also 100m.

The displacement of point B from the origin O is +100m.
The distance of point A from the origin O is -100m.
The + and – sign show the direction of the displacement.

Example:

Adli go to work by motorcycle everyday as shown in the diagram above.
The distance that Adli travels from his house to the factory is 200m.
The displacement of Adli from his house after arriving at the factory is 120m.

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#### Distance and Displacement in One Dimension

This video describes the difference between distance and displacement in one dimensional motion. Also shows how to calculate displacement.