Solve it
Asked by hariom2083
19th July 2018,
6:38 PM
Answered by Expert
Answer:
Let particle-A is projected with intial velocity v and the projection angle is θ.
Let particle-B is projected with intial velocity v and the projection angle is 2θ. (θ<45)
Let after time t, velocities of both the particles are parallel to each other.
In projectile motion, tangent of angle made by the velocity of particle with horizontal at a given instant is
the ratio of y-component of velocity to the x-component of velocity.
hence if the above mentioned ratio is same for both the particle, then their velocities are parallel to each other.
If the ratio of y-component velocity to x-component velocity at the time t is equated
for both the particle, then we get the following equation.
I leave it as a trignometry exercise to the student to get the answer, 
Answered by Expert
19th July 2018,
9:50 PM
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