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

• Correct answer
  A

  At a later time the external force F balances the resistive force
• Correct answer
  B

  The resistive force experienced by the plate is proportional to v
• C

  The plate will continue to move with constant non zero acceleration at all times
• Correct answer
  D

  The pressure difference between the leading and trailing faces of the plate is proportional to $uv$

Hence, the correct answer is options: 'A', 'B', 'D'.