a particle has been projected from origin with a speed of 20m/s at an angle 60 with horizontal.the horizontal direction as x.axis and verticledirection as y.the x coordinate of the particle when its velocity vector becomes perpendicular to the initial velocity vector is
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they will become perpendicular at the highest point using formula of ascent usin theta /g and then ux cos theta uy sin theta u can easily calulate corrdinates
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