ALL the differences between SPEED and VELOCITY
Answers
- The short answer is that velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity—it is the magnitude of the velocity. Speed is measured in units of distance divided by time (e.g., miles per hour, feet per second, meters per second, etc.).
Answer:
1
Definition
Velocity can be defined as the rate at which an object changes position in a certain direction.
The rate at which an object covers a certain distance is known as speed.
2
Type of quantity
Vector quantity
Scalar quantity
3
Magnitude
Velocity can be zero, negative, or positive.
Speed can never be negative or zero.
4
Change of direction
The velocity of the object changes with the change in direction, therefore the object must follow one direction.
The average speed will continue to count even if the object change direction.
5
Change with time
Velocity can decrease with time. For a moving object, it can be 0.
Speed never decreases with time. For a moving object, it is never 0.
6
Interrelation
An object may possess different velocities but the same speed.
Speed may or may not be equal to velocity.
7
Unit (SI)
Velocity is measured in m/s
Speed is measured in m/s
8
Equation
= ∆x/∆t; where is the average velocity, ‘∆t’ is the time of arrival and ‘∆x’ is the displacement.
v = d/t; where ‘v’ is the average speed, ‘t’ is time taken to travel the distance and ‘d’ is the distance travelled.
9
Example
A train going towards south with an average speed of 50 km/h will have a velocity of 50km/h, north. An object going straight in a particular direction is considered to have velocity.