Distance: Distance is a scalar quantity representing the interval between two points. It is just the magnitude of the interval.
Displacement: Displacement can be defined as distance between the initial and final point of an object. It is a vector quantity having both magnitude and direction.
Speed: Speed can be defined as “how fast something moves” or it can be explained more scientifically as “the distance covered in a unit of time”. Speed is a scalar quantity.
Velocity: It can be defined as “speed having direction” or displacement in a unit of time. Velocity is a vector quantity and it has both magnitude and direction.
Acceleration: We can easily define acceleration as “change in velocity”. This change can be in the magnitude (speed) of the velocity or in the direction of the velocity.
Equations of Linear Motion