1.

if the position of a particle of any instant t is given by x = t^3find the acceleration of the particle at t = 2 seconds​

Answer»

\large{\bf{\gray{\underline{\underline{\orange{Given:}}}}}}

POSITION equation of particle has been provided.

\dag\:\boxed{\bf{x=t^3}}

\large{\bf{\gray{\underline{\underline{\green{To\:Find:}}}}}}

We have to find ACCELERATION of particle at t = 2s.

\large{\bf{\gray{\underline{\underline{\pink{Solution:}}}}}}

Instantaneous VELOCITY :

:\implies\sf\:v=(lim\:\Delta t\to 0)\:\dfrac{\Delta x}{\Delta t}=\dfrac{dx}{dt}

:\implies\tt\:v=\dfrac{d(t^3)}{dt}

:\implies\bf\:v=3t^2

Instantaneous acceleration :

:\implies\sf\:a=(lim\:\Delta t\to 0)\:\dfrac{\Delta v}{\Delta t}=\dfrac{dv}{dt}

:\implies\tt\:a=\dfrac{d(3t^2)}{dt}

:\implies\bf\:a=6t

Putting t = 2, we GET

:\implies\tt\:a=6(2)

:\implies\boxed{\bf{\red{a=12\:ms^{-2}}}}



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