Question

Plz Plz explain Acceleration​

Answer 1

Acceleration of a body is the rate of change of velocity of that body per unit time.

Its formula is:

Acceleration = Initial velocity - Final velocity/ Time.

or we can say:

a = v-u/t

Its S.I unit is m/s^-2.

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Answer 2

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✒ Acceleration

• Acceleration is the rate of change of velocity with time.
• It is defined as change of velocity of body per unit time.
• SI unit of acceleration is m/s²
• It is Vector Quantity.
• Acceleration = Change in velocity / time

= Final velocity - Initial velocity / time

= v - u / t

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✒ Types of Acceleration

✏ There is two types of Acceleration :-

1. Uniform Acceleration

If the velocity changes in equal amounts in equal time of intervals and the object travels in a straight line than the uniform acceleration take place.

2. Non-uniform Acceleration

If the velocity changes in an equal amount in unequal intervals of time and object travels in straight line then non uniform acceleration take place.

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-: Additional Information :-

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✏ Zero Acceleration -

if the change in velocity is zero that is either object is at rest or moving with uniform velocity than zero acceleration will take place.

✏ Positive Acceleration -

• When velocity of a body increases then positive acceleration take place.
• i.e v>u

✏ Negative Acceleration -

• When velocity of a body decreases the negative acceleration take place.
• It is in the opposite direction of velocity.
• i.e v<u

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✒ Example

Problem :-

A toy car accelerates from 3m/s to 5m/s in 5 s. What is its acceleration?

Answer :-

Given: Initial Velocity u = 3m/s,

Final Velocity v = 5m/s,

Time taken t = 5s.

= v - u / t

= 5 - 3 / 5

= 2 /5

= - 0.4 m/s²

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