JEE Advanced 2017 Paper 1

Section: Physics

Question : 4 of 54

Marks: +1, -0

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?

[JEE Adv 2017 P1]

The pressure difference between the leading and trailing faces of the plate is proportional to uv
The plate will continue to move with constant non-zero acceleration, at all times
At a later time external force F balances the resistive force
The resistive force experienced by the plate is proportional to v

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