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NEET
Exam
NEET
Subject
Physics
Chapter
Motion in One Dimension

NEET · Physics · Motion in One Dimension

Two trains, which are moving along different tracks in opposite...

Two trains, which are moving along different tracks in opposite directions are put on the same track by mistake. On noticing the mistake, when the trains are 300 m300 \mathrm{~m} apart the drivers start slowing down the trains. The graphs given below show decrease in their velocities as function of time. The separation between the trains when both have stopped is Two trains, which are moving along different tracks in opposite directions are put on the same track by mistake. On

Options

  1. A120 m120\ m
  2. B20 m20\ m
  3. C60 m60\ m
  4. D280 m280\ m

Correct answer

B. 20 m20\ m

Step-by-step solution

Given initial distance between trains =300 m=300 \mathrm{~m}. From given graph and as per question two trains are moving in opposite direction. So the separation between the trains when both have stopped =300−(12×10×40+12×9×20)=300−200+80=20 m\begin{aligned} & =300-\left(\frac{1}{2} \times 10 \times 40+\frac{1}{2} \times 9 \times 20\right) \\ & =300-200+80=20 \mathrm{~m} \end{aligned} Two trains, which are moving along different tracks in opposite directions are put on the same track by mistake. On
Given θ\theta is the angle between the total acceleration and tangential acceleration.
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