difine of distance and displacement
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distance is the total path covered by a body. It is always positive. It is a scalar quantity.
displacement is the shortest path covered by a body. It may be positive, negative or zero and displacement is a vector quantity.
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Distance
- A distance measurement is a numerical representation of the distance between two objects or places.
- Distance can refer to either a physical length or an estimate based on other factors in physics or common use.
- |AB| refers to the distance between two points A and B.
- "Distance from A to B" and "distance from B to A" are often used interchangeably. A distance function or metric is a way of explaining what it means for components of a space to be "near to" or "far away" from each other in mathematics.
- Psychological distance is defined as "the different ways in which an item could be divorced from" the self along dimensions such as "time, space, social distance, and hypotheticality," and is a non-numerical measurement in psychology and social sciences.
Displacement
- A displacement is the smallest distance between the beginning and final positions of a moving point P.
- It measures the distance and direction of net or total motion along a straight line from the point trajectory's beginning to final positions.
- The translation that transfers the original position to the end position can be used to determine if a displacement has occurred.
- A displacement can alternatively be thought of as a relative position (due to motion), i.e., the final position xf of a point in relation to its beginning location xi.
- The difference between the final and beginning locations is used to define the associated displacement vector:
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