A particle starts from rest with an acceleration a= lambda/x^2, where lambda >0 and x is the distance of the particle from a fixed point O. The particle is at a distance of u from O, when it is at rest. Its velocity when at a distance 2u from O is

Dear Student,
                      here given  a=λx2dvdtdxdx=λx2dvdxv=λx20v'vdv=u2uλx2dxv'2/2=-λxu2uv'2/2=-λ2u+λu=λ2uv'=λuunit

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