# What is the difference between speed and velocity and acceleration?

##### 1 Answer

Jan 3, 2016

#### Answer:

see explanation below

#### Explanation:

**Speed** is the distance travelled per unit time irrespective of direction, so only magnitude is of importance, and that it is a scalar quantity. Speed can be calculated using the formula:

**Velocity** is the distance travelled per unit time in a specific direction, so both magnitude and direction are important, and that it is a vector quantity. Velocity can be calculated using the formula:

**Acceleration** is the rate of change of velocity of an object. Magnitude and direction are both considered, so it is a vector quantity. Acceleration can be calculated using the formula: