# Acceleration and Deceleration or Retardation

## Acceleration and Deceleration or Retardation

What is Acceleration?

Acceleration is the rate of change of velocity with time.

What is Deceleration?

Deceleration is the rate of decrease of velocity with time.

What is Uniform acceleration?

If the velocity of an object towards a specific direction increases at the same rate it is a uniform velocity.

If the rate of increase of velocity of a moving body in a particular direction is maintained constant all the time, then the acceleration is said to be uniform.

What is Non-uniform acceleration?

If the velocity of an object towards a specific direction increases at different rates it is a uniform velocity.

The acceleration of an object moving with uniform velocity is zero

The rate of change of velocity along with each unit of time is called acceleration. If the body moves with a uniform velocity, it clearly indicates that no change takes place in velocity. That is, acceleration is zero.

Symbolically, v - u = 0

v = u

a = (v - u) t

= 0/t

= 0

The acceleration due to gravity is an example of uniform acceleration

If the rate of increase of velocity of a moving body in a particular direction is maintained constant all the time, then the acceleration is said to be uniform.

An example of uniform acceleration is gravitational acceleration. Due to gravity, the acceleration of a freely falling body is 9.8 ms-2, that is, its velocity increases by 9.8 ms-1 for each successive second.

So, gravitational acceleration is an example of uniform acceleration.

*

No Comment