Physics-
General
Easy

Question

A boy playing on the roof of a 10m high building throws a ball with a speed of 10m/s at an angle of 30° with the horizontal. How far from the throwing point the ball be at a height of 10m from the ground ?

  1. 4.33m    
  2. 2.60m    
  3. 8.66m    
  4. 5.20m    

The correct answer is: 8.66m


    R equals fraction numerator U to the power of 2 end exponent s i n invisible function application 2 theta over denominator g end fraction equals fraction numerator 10 cross times 10 cross times s i n invisible function application 6 0 over denominator 10 end fraction equals 5 square root of 3 equals 8.66 m

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