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A particle is projected along a horizont...

A particle is projected along a horizontal field whose coefficient of friction varies as `mu=A//r^(2)`, where r is the distance from the origin in metres and A is a positive constant. The initial distance of the particle 1m from the origin and its velocityy is radially outwards. the minimum initial velocity at this point so the particle never stops is `sqrt(kgA)`. Find k.

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