Two particles are projected simultaneously with the same speed v in the same vertical plane with angles of elevation θ and 2θ, where θ<45∘. At what time will their velocities be parallel ?

Two particles are projected simultaneously with the same speed v in th

1.	Two particles are projected simultaneously with the same speed v in the same vertical plane with angles of elevation θ and 2θ, where θ<45∘. At what time will their velocities be parallel ?
Answer» Two particles are projected simultaneously with the same speed $v$ in the same vertical plane with angles of elevation $θ$ and $2 θ$ , where $θ < 45^{\circ}$ . At what time will their velocities be parallel ?

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Two particles are projected simultaneously with the same speed v in the same vertical plane with angles of elevation θ and 2θ, where θ&lt;45∘. At what time will their velocities be parallel ?

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Two particles are projected simultaneously with the same speed v in the same vertical plane with angles of elevation θ and 2θ, where θ<45∘. At what time will their velocities be parallel ?