1.

the velocity of a particle moving along x axis is given as v=x2-5x+4 find the magnitude of the acceleration of the particle when the velocity of the particle is zero

Answer» EXPLANATION GIVEN velocity
v=x2−5x+4
Acceleration a≡dvdt

∴a=ddt(x2−5x+4)
⇒a=(2xdxdt−5dxdt)

We ALSO know that dxdt≡v

⇒a=(2x−5)v

at v=0 above equation becomes
a=0



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