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A projectile A is thrown at an angle of 30 degree to the horizontal from point P. At the same time, another projectile B is thrown with velocity v to the power of 2 end exponent upwards from the point Q vertically below the highest point. For B to collide with A comma blank fraction numerator v subscript 2 end subscript over denominator v subscript 1 end subscript end fraction should be

  1. 1    
  2. 2    
  3. fraction numerator 1 over denominator 2 end fraction    
  4. 4    

The correct answer is: fraction numerator 1 over denominator 2 end fraction


    Equating velocities along the vertical,
    v subscript 2 end subscript equals v subscript 1 end subscript sin invisible function application 30 degree o r blank fraction numerator v subscript 2 end subscript over denominator v subscript 1 end subscript end fraction equals fraction numerator 1 over denominator 2 end fraction

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