Question

. What do you mean by acceleration ? . ​

Answer 1

Answer:

here is the definition

Explanation:

Acceleration : rate at which velocity changes , with respect to speed, time and direction

hope it helps :)

Answer 2

Required Answer :

• Acceleration is the rate of change in velocity or acceleration is the change in velocity with time.

• It is a vector quantity, i.e it has both magnitude and direction.

• Negative acceleration is called retardation. Retardation is acceleration with negative sign.

• The SI unit of acceleration is m/s².

• Negative acceleration is also known as deceleration.

• Uniform Acceleration: When the velocity of a body increases at a uniform rate, its acceleration is uniform.

• Non-uniform Acceleration : When the velocity of a body increases at a non-uniform rate, its acceleration is non-uniform.

Derivation Of the Formula of Acceleration :

As acceleration is the rate of change in velocity. Expressing this statement in the form of an equation,

$\longrightarrow\sf{Acceleration= \dfrac{Change \; in \; Velocity}{Time}}$

Change in velocity can be expressed as ∆v or the difference in between final velocity and initial velocity. Time can be expressed by t and acceleration is expressed by a.

$\longrightarrow\sf{a= \dfrac{\Delta v }{t}}$

$\longrightarrow\boxed{\sf{\red{a= \dfrac{v-u}{t}}}}$

Here,

• a denotes acceleration
• v denotes final velocity
• u denotes initial velocity
• t denotes time

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