Question

A flat plate is moving normal to its plane through a gas under the action of 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?
[A] The resistive force experienced by the plate is proportional to v
[B] The pressure difference between the leading and trailing faces of the plate is proportional to uv
[C] The plate will continue to move with constant non-zero acceleration, at all times
[D] At a later time the external force F balances the resistive force.

Answer 1

Answer:

A is true B is true and D is true and C is false

Explanation:

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