90.A projectile of mass 2 k.g. has velocity 3m/s and 4m/s at two points during it's flight in the uniform gravitational field of the Earth. If these two velocities are perpendicular to each other,then the minimum kinetic energy of the particle during it's flight is A)6.32 J. B)8.40 J. C)16.32 J. D)5.76 J.

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