Second Equation of Motion

 

Second Equation of Motion

 

According to the definition of the acceleration “The rate of change of velocity is called acceleration”.

i.e. Acceleration = Change of velocity/time

= > a = Vf-Vi/t

 

at = Vf – Vi

 

or

 

Vf = Vi + at ———–(i)

 

Substituting The average velocity:

 

Vav = (Vi + Vf)2 ——–(ii)

 

The distance covered by the body in a unit:

 

S = Vav/t

 

Putting the value of Vav from Equation (ii):

 

S = (Vi + Vf)/2] * t

 

Putting the value of Vf from equation (i).

 

S = [(Vi+Vi+at)/2]*t

 

S = [(2Vi+at)/2]*t

 

S = (Vi+at/2}*t

 

S = (ViT + l/2at2) (Here 2 is The square of the Time “t”. Don’t write this sentence in Examination}

 

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