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JEE Main2003PhysicsMotion in Two DimensionsActual

A boy playing on the roof of a 10 ~m high building throws a ball with a speed of 10 ~m / s at an angle of 30^ with the horizontal. How far from the throwing point will the ball be at the height of 10 ~m from the ground? [ g =10 ~m / s ^2, 30^ = 1 2 , 30^ = 3 2 ]

Options

  1. A5.20 ~m
  2. B4.33 ~m
  3. C2.60 ~m
  4. D8.66 ~m

Correct answer

D. 8.66 ~m

Step-by-step solution

From, the question if the horizontal distance is none other than the horizontal range on the level of the roof of building Range = u ^2 2 g = (10)^2 (2 30) g = 10 10 3 2 10 =8.66

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