A flat plate is moving normal to its plane through a gas under the action of a constant…
Physics · JEE Advanced · NTA Exams — Kinetic Theory of Gases
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 is much less than the average speed u of the gas molecules. Which of the following options is/are true?
- At a later time the external force F balances the resistive force
- The plate will continue to move with constant
non-zero acceleration, at all times - The resistive force experienced by the plate is proportional to v
- The pressure difference between the leading and trailing faces of the plate is proportional to uv.
Answer
(C) The resistive force experienced by the plate is proportional to v
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