Speed and velocity are terms in motion. These are two different physical quantities. Speed is the distance covered by a body in unit time. It is a scalar quantity. While velocity is the displacement covered by a body in unit time. It is a vector quantity.
In this post, you are going to differentiate b/w Speed and velocity in detail.
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Speed and velocity are terms used as synonyms to refer to the relationship between the distance traveled and the time is taken to cover it.
However, speed and speed do not always refer to the same thing. In more specialized fields, such as physics, they have slight differences.
The speed refers to the distance traveled by an object in a time determined. Since this is calculated by taking the distance traveled and dividing it by time, speed is a scalar magnitude.
Instead, velocity refers to the time interval it takes for an object to move in a certain direction. By involving the direction or sense of movement, speed is a vector quantity.
What is speed?
The speed indicates the relationship between the distance traveled by an object and the time that this used to cover it. As such, it can be measured in meters, kilometers, miles, or knots (in the water environment), per hour, or per second.
Since speed is expressed according to distance and time, it is characterized by being a scalar quantity, which means that only numerical units are used to describe speed.
Since speed implies covering a distance during a time interval, it can only give a positive value.
- Consider the distance traveled and the time elapsed.
- It is a scalar magnitude.
- Average speed results from the division between distance and a time interval.
- It is always positive.
Average speed refers to the total distance traveled during a given time.
For example, when Usain Bolt set the world record for 100 flat meters in 9.58 seconds, his average speed was 10.44 meters per second.
What is velocity?
The rate expresses the ratio between the distance traveled by an object and the time it takes you to cross it towards a direction specific.
Basically, speed refers to the positional change of an object, from an initial reference point to the place to which this object has moved (the endpoint of movement), and to the time it has taken to do so.
Being a magnitude that also determines the direction in which the displacement occurs, the velocity is considered a vector magnitude.
Speed is measured in meters per second (m / s, according to the International System of Units), by direction.
In this sense, for an object to have a constant speed, it must move in a constant direction for a certain amount of time. Any change in direction will simply variations in speed.
- Consider changing the position of an object in a specific direction.
- It is a vector quantity.
- The average speed involves the displacement between the time interval.
- You can give a positive, negative, or even null (zero) value.
Difference between speed and velocity
|Speed is the distance covered by a body in unit time.||Velocity is the displacement covered by a body in a unit time.|
|It is a scalar quantity.||It is a vector quantity.|
|It Determines “How fast an object is moving”?||It determines “In which direction an object is moving”?|
|It indicates the rapidity of objects.||It indicates both the rapidity and position of the object.|
|It is the rate of change of distance.||It is a rate of change of displacement.|
|It cannot be negative.||The velocity of moving Objects can be negative, positive or can be zero.|
Speed Vs Velocity