A glass plate of 0.2 m^(2) in area is pulled with a velocity of 0.1 m/s over a larger glass plate that is at rest. What force is necessary to pull the upper plate if the space between them is 0.003 m and is filled with oil of eta 0.01 Ns/m^(2).

A glass plate of 0.2 m^(2) in area is pulled with a velocity of 0.1 m/

1.	A glass plate of 0.2 m^(2) in area is pulled with a velocity of 0.1 m/s over a larger glass plate that is at rest. What force is necessary to pull the upper plate if the space between them is 0.003 m and is filled with oil of eta 0.01 Ns/m^(2).
Answer» SOLUTION :`F=etaA(DV)/(DY)` `=0.01xx0.2xx(0.1)/(0.003)=66.7xx10^(-3)N`