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A shell if fired from a point O at an angle of 60 degree with a speed of 40 m/s and it strikes a horizontal plane through O at a point A. The gun is fired a second time with the same angle of elevation but a different speed v. If it hits the target which starts to rise vertically from A with a constant speed 9root3 m/s at the same instant as the shell is fired, find v (take g = 10 m/s^2).


A shell if fired from a point O at an angle of 60 degree with a speed of 40 m/s and it strikes a horizontal plane through O at a point A. The gun is fired a second time with the same angle of elevation but a different speed v. If it hits the target which starts to rise vertically from A with a constant speed 9root3 m/s at the same instant as the shell is fired, find v (take g = 10 m/s^2).


Grade:11

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