Position

Definition

Position is a vector quantity that refers to the location of a point in space relative to an origin. It is typically represented by coordinates in a given reference frame.

5 Must Know Facts For Your Next Test

1. Position is often denoted by the symbol $\vec{r}$ or $x$ in one-dimensional motion.
2. It is measured in meters (m) in the International System of Units (SI).
3. The position vector can change over time, indicating motion along a straight line.
4. Position can be positive or negative depending on its direction relative to the chosen origin.
5. Initial position ($x_0$) and final position ($x_f$) are used to calculate displacement.

Review Questions

• What symbol is commonly used to denote position in physics?
• How does position differ from displacement?
• Why can the position have negative values?

Related terms

Displacement:

A vector quantity that represents the change in position of an object. It is calculated as the difference between final and initial positions.

Reference Frame:

A coordinate system or set of axes within which measurements are made. It provides a perspective for describing positions, velocities, and accelerations.

Scalar Quantity:

A physical quantity that has only magnitude and no direction, such as mass or temperature.