Question

what do you mean by acceleration or retadation​

Answer 1

$\huge\mathfrak\red{Answer:}$

For understanding acceleration you first need to know what Velocity is .

Velocity is the rate of Change of displacement. It is a vector quantity.

Displacement can be Defined as the shorter distance between two points. It is a vector quantity.

Now, coming to Acceleration it is the rate of Change of velocity..

It is given by:

$a = v - u \div t$

It is a vector quantity.

SI unit of Acceleration is m/s^2

Retardation is the opposite of Acceleration.

Retardation means decreasing the speed or changing direction.

It is also known as the nagative acceleration.

Answer 2

Answer:

Acceleration is defined as the change in velocity per unit time. Acceleration is measured in m/s2. = Retardation. The negative acceleration is called retardation or deceleration.