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There is a 1mm thick layer of glycerine ...

There is a 1mm thick layer of glycerine between a flat plate of area `100cm^(2)` and and a big plate. If te coefficient of viscosity of glycerine is `1.0kg//m-sec`, then how much force is required to move the plate with a velocity of 7 cm/sec.

A

`3.5N`

B

`0.7N`

C

`1.4N`

D

None

Text Solution

Verified by Experts

The correct Answer is:
B
`F=etaA(dv)/(dx)" "impliesF=(1xx10^(-2)xx7xx10^(-2))/(10^(-3))impliesF=0.7N`
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