 # Unit of Acceleration

Usually, if we notice any change in the velocity of an object, it is known to be accelerating. Thus, acceleration is defined as the rate of change of velocity of an object with respect to time. Accelerations are vector quantities meaning they have magnitude and direction. So how do we measure acceleration or what is the unit of acceleration? We will find answers to these questions below.

## SI Unit of Acceleration

When we calculate acceleration, it basically involves velocity and time factors and dividing them in terms of units, meters per second [m/s] by second [s]. Moreover, dividing distance by time twice is equal to dividing distance by the square of time. Therefore, the SI unit of acceleration is the meter per second squared or (ms−2).

### Other Acceleration Units

Another frequently used unit is based on acceleration due to gravity. The unit called acceleration due to gravity is represented by a Roman g. However, students have to keep in mind that it is not the same as the natural phenomena called acceleration due to gravity which is represented by an italic g. Most of the time, people refer to change in velocity as “g-force”. Here, the g is a measure of acceleration and not force. Some other units include foot per second squared, Galileo or gal, orders of magnitude, standard gravity, and plank acceleration.

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## Watch the Video and Learn about 2D Motion and Projectile Motion ## Frequently Asked Questions – FAQs

Q1

### What is the SI unit of acceleration?

The SI unit of acceleration is the meter per second squared.

Q2

### What are the terms that can be used to describe motion?

Acceleration, time, speed, velocity, distance and displacement are the terms that can be used to describe motion.

Q3

### What is acceleration?

Acceleration is defined as the rate of change of motion of a body. In other words, the measure of the rate of change in its speed along with direction with respect to time is called acceleration.

Q4

### What are the main types of acceleration?

Linear acceleration and circular acceleration are the main types of acceleration.

Q5

### What is speed?

Speed can be considered as the rate at which a body covers distance.

Q6

### What is velocity?

Velocity can be defined as the directional speed of a body in movement as an implication if the body’s rate of change in position is perceived from a particular point of reference and as calculated by a specific standard of time. Example: 125km/h to the south.

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