# Velocity Questions and Answers (Q&A) #### R. Barnes

I am a nature lover.

Velocity and Speed are terms used in physics. Both are used to calculate the distance between two points. It is effortless to think both velocity and Speed are the same; in fact, many people use the words interchangeably. But the truth is, velocity is quite different from Speed. Velocity can be defined as the rate of change of displacement concerning time. It is used to determine the distance of an object from one point to another concerning time in a specific direction.

And that is why velocity is a vector quantity because it has both magnitude and direction. The SI unit for velocity is meter per second. Speed, on the other hand, can be defined as the total distance covered by an object concerning time. It is a scalar quantity because it has only magnitude but no direction. The SI unit for Speed is a meter #### R. Jones

Average Speed and Average Velocity are both similar, in that, both terms refer to the change in position of a body. However, there are still some differences between them. Average speed can be defined as the total distance covered by an object divided by the total time taken when an object moves from point A to point B. The average speed of such an object is calculated by dividing the total distance between point A and A by the total time is taken by the object to cover the distance.

Speed is a scalar quantity because it talks only about the magnitude and not the direction. Average velocity, on the other hand, is the total displacement of an object divided by the total time taken by the object. Displacement is not only talking about the total distance covered by an object, but also the initial position of an object and the final position. Velocity is a vector quantity because it has both magnitude and direction. #### drtaylor

The main difference between speed and velocity is that speed does not have a particular direction. Speed is hence scalar quantity. On the other hand, velocity has a direction which makes it a vector quantity. Scalar quantities are those that are directionless, and do not change with a change in direction.

Hence, they are independent on direction. Vector quantities like velocity are dependent on the absolute direction, and hence with a change in direction, the velocity will change even if the magnitude of the velocity remains constant. This is the only main difference that exists between speed and velocity in physics. #### R. Barnes

I am a nature lover.

Velocity and acceleration are two terms in physics that explain the movement of an object from one point to another. While one explains the distance covered by an object from one point to another, the other describes how slow or fast an object moves from one point to another. Both are vector quantities. However, velocity differs from an acceleration in some ways. Velocity is a vector quantity, and it denotes the rate of change of speed concerning time. It is used to describe how an object moves from point A to point B in a specific direction concerning time.

The SI unit for velocity is meter per second i.e., m/s. Acceleration, on the other hand, is also a vector quantity and can be defined as the change of velocity concerning time, it is used to describe how fast or slow an object moves from point A to point B. The SI unit for acceleration is meter per second squared.  