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BITSAT2020PhysicsMotion in One DimensionActual

From a 200 ~m high tower, one ball is thrown upwards with speed of 10 ~ms ⁻¹ and another is thrown vertically downwards at the same speeds simultaneously. The time difference of their reaching the ground will be nearest to

Options

  1. A12 ~s
  2. B6 ~s
  3. C2 ~s
  4. D1 ~s

Correct answer

C. 2 ~s

Step-by-step solution

The ball thrown upward will lose velocity in ls. It return back to thrown point in another 1 ~s with the same velocity as second. Thus the difference will be 2 ~s .

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