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NTA Abhyas JEE Main2020PhysicsMotion in One DimensionPractice

A train of length L move with a constant speed V t . A person at the back of the train fires a bullet at time t = 0 towards a target which is at a distance of D (at time t = 0 ) from the front of the train (on the same direction of motion). Another person at the front of the train fires another bullet at time t = T towards the same target. Both bullets reach the target at the same time. Assuming the speed of the bull

Options

  1. AT V b × 2 V t
  2. BT V b + V t
  3. C2 T V b + 2 V t
  4. D2 T V b - 2 V t

Correct answer

B. T V b + V t

Step-by-step solution

Bullets from both person reaches target at same instant, so we equate time to get, L + D ( v t + v b ) = D ( v b + v t ) + T L = ( v b + v t ) T

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