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Railways PYQCBT 2 2017

RRB NTPC · Question 29

A tank, filled partially with a liquid, is subjected to uniform horizonal acceleration. Which of the following is true about the surface of the liquid in the tank?

  1. The liquid surface falls down on the direction of motion and rises up on the back side of the tank

  2. The liquid surface falls down only at the center of the tank

  3. The surface of liquid remains horizontal

  4. None of the above

Show answer & explanation

Answer: (A) The liquid surface falls down on the direction of motion and rises up on the back side of the tank

Explanation

When the tank accelerates forward, the liquid tends to stay behind (inertia). Its surface becomes an inclined plane: it falls at the front, in the direction of motion, and rises at the back of the tank.