A flat plate is moving normal to its plane through a gas under the | Filo
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Class 11

Physics

Mechanics

Mechanical Properties of Fluids

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A flat plate is moving normal to its plane through a gas under the action of a constant force . The gas is kept at a very low pressure. The speed of the plate is much less than the average speed of the gas molecules. Which of the following options is/are true?

  1. The resistive force experienced by the plate is proportional to
  2. At a later time the external force balances the resistive force
  3. The plate will continue to move with constant non-zero acceleration, at all times
  4. The pressure difference between the leading and trailing faces of the plate is proportional to
Correct Answer: Option(b)(d)
Solution:


As and are acting in opposite direction so 
m is the mass of the plate.
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