Difference Between Distance and Displacement

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Distance is the total path covered by a body during its motion and displacement is the shortest path covered by a body during its motion. Not to mention, both of them are used to specify the length between the two locations. However, they are totally opposite to each other.

In this exclusive article, we will talk about so many distance and displacement differences. But, before going into a deep discussion, let me give you a brief review of the two in a tabular form. Let’s dive right in…!!!

 

Difference Between Distance and Displacement

 DistanceDisplacement
1.Distance is the total path covered by a body during its motion.Displacement is the shortest path covered by a body during its motion
2.Distance is a scalar quantity. It has magnitude but no directionDisplacement is a vector quantity. It has both magnitude and direction.
3.The S.I. unit of displacement is the meter.It is not path-dependent i.e it does not change according to the path taken.
4.The value of the distance is always positive.The value of displacement can be negative, positive, or even zero.
5.Distance never decreases over time.In some special cases, displacement can decrease over time
6.It is denoted by “d”.It is denoted by “s”.
7.The S.I. unit of displacement is meter.It is path-dependent i.e. it changes according to the path taken.
8.The formula for distance is Distance(d) = Speed(s) × Time (t).The formula for displacement is Displacement(s) = Velocity(v) ×Time(t).

 

What is Distance?

By definition, Distance is nothing but the total path covered by a body during its motion. One can also say that the distance is the actual length of a path taken by a body from one point to another. See the image below for a proper understanding.

distance-and-displacement-difference
Image Credit: Wikimedia Commons

Simply speaking, it tells us how much of a path a body has covered during its motion. And, since it is a scalar quantity, therefore, as a result, to calculate distance, there is no need to consider the direction of its motion.

The S.I. unit of distance is a meter. And, it is denoted by “d”. Just because it is a scalar quantity, there is no need to indicate it with an arrow.

 

Properties of Distance

There can be so many properties of distance. Some of them are listed below:

  • Distance is a scalar quantity.
  • Distance is path-dependent.
  • The distance between two points is always positive.
  • Distance is symmetric, etc.

 

What is Displacement?

By definition, Displacement is nothing but the shortest path covered by a body during its motion. One can also say that displacement is the shortest length of a path taken by a body from one point to another.

Simply speaking, it tells us how far out of place a body is from its original position. And, since it is a vector quantity, therefore, as a result, to calculate displacement, the direction of the motion has to be considered.

The S.I. unit of displacement is the meter. And, it is denoted by “s”. Just because it is a vector quantity, displacement is always indicated with an arrow.

 

Properties of Displacement

There can be so many properties of displacement. Some of them are listed below:

  • Displacement is a vector quantity.
  • Displacement is path-independent.
  • The displacement between two points can be negative, positive, or, zero.
  • Displacement is anti-symmetric, etc.

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I am a Physics Educator, positively impacting the students by igniting their imagination and curiosity about nature as well as their laws and guiding them to answers. Talking about education, I am a postgraduate in physics and trying to collect as much as I can out of the immense treasure of knowledge.

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