Particle is thrown with speed 'u' making an angle 'alpha' horizontal from the ground . After how much time velocityof particle make angle with theta with horizontal.

Particle is thrown with speed 'u' making an angle 'alpha' horizontal f

1.	Particle is thrown with speed 'u' making an angle 'alpha' horizontal from the ground . After how much time velocityof particle make angle with theta with horizontal.
Answer» Let the horizontal COMPONENT of both the velocities at POINT making an angle a (VELOCITY u) and at point making an angle b (say velocity v) is given as, ux=ucosavx=vcosb In a projectile motion, the horizontal component is ALWAYS same at every point. Thus we GET, ucosa=vcosbv=ucosacosb

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Particle is thrown with speed 'u' making an angle 'alpha' horizontal from the ground . After how much time velocityof particle make angle with theta with horizontal.

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