1.

A force barF=barVxxbarAis exerted on a particle in addition to the force of gravity, where barVis the velocity of the particle and barAis a constant vector in the horizontal direction. The minimum speed of a particle of mass 3kg be projected, so that it continues to move undeflected with a constant velocity is (xg)/A. Then 'x' is (consider the plane of the ground as xy plane)

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