What is the same between speed and velocity?

Answer 1

In common usage Velocity and Speed are used interchangeably. However, velocity has a specific meaning in the scientific sense.

speed is the rate at which you are moving.
velocity is the rate at which you are moving in a specific direction.

So if two space ships are heading away from the sun in different directions, but with the same speed, these spaceships are said to have a different velocity.

Related to velocity is acceleration. Again in common usage it is how fast you are speeding up or slowing down. In science it has a similar meaning but it is the rate of change of velocity.

In other words, you can experience acceleration simply by changing you direction of travel, even if you keep the speed constant.

Answer 2

Well, there are two different types of quantities...Vector Quantities and Scalar Quantities. Scalar Quantities are just numbers and Vector Quantities are the number with a + or - sign to indicate direction. For example, speed does not tell you direction so it is a scalar quantity, but velocity requires a direction and is therefore a Vector Quantity.

If left is negative and right is positive and a man is running at 3 m/h to the left, then the speed is 3 m/h but the velocity is -3 m/h because he is traveling in a negative direction.

Answer 3

Speed and velocity are similar because they are both measures of quantity that involve motion. They differ because speed is a scalar quantity while velocity is a vector.

Answer 4

speed is a scalar quantity ( described by magnitude only), and velocity is a vector quantity (described by both magnitude and direction).

Answer 5

The magnitude(the value). Speed is only magnitude Velocity is magnitude & direction