43 A projectile is moving on xy plane such that horizontal and vertical direction are along x axis and y axis respectively The

Question

43 A projectile is moving on xy plane such that horizontal and vertical direction are along x axis and y axis respectively The projectile is fired from the origin at a large height with initial velocity 50i 20 m s The time after which instantaneous velocity of the projectile becomes perpendicular to its initial velocity is 1 7 5 s 21 55 2 14 5 s 4 10 5 s

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