notes
Distance: The distance covered by an object is described as the total path length covered by an object between two endpoints.
Distance is a numerical quantity. We do not mention the direction in which an object is travelling while mentioning about the distance covered by that object.
Displacement: The shortest possible distance between the initial and final position of an object is called Displacement. Displacement is denoted by Δx.
Zero Displacement: When the first and last positions of an object are same, the displacement is zero.
Negative Displacement and Positive Displacement:
Here, displacement of object B is negative
ΔB = Bf − B0
= 7–12
= –5
A negative sign indicates opposite direction here.
Also, displacement of object A is positive
ΔA = Af − A0
= 7– 0
= 7
Distance |
Displacement |
It is the actual path length travelled by an object. |
It is the shortest distance between initial point and final point. |
It is a scalar quantity. |
It is a vector quantity,. |
It is always positive and cant be zero. |
It can be positive, negative or zero |
Vectors and Scalar Quantities:
- Vector is a quantity which have both magnitude and direction. For examples: Force, position etc.
- Scalar is quantity with which direction is not associated. For examples: Mass, temperature, time etc.