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A particle is projected with a speed V from a point O making an angle of 30° with the vertic....
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A particle is projected with a speed V from a point O making an angle of 30° with the vertical. At the same instant, a second particle is thrown vertically upward from point A with speed v. The two particles reach H, the highest point on the parabolic path of the first particle simultaneously, then the ratio V/v.