$A$ metal cube of side $10 \,cm$ rests on a film of a liquid of thickness $0.2 \,mm$. If upon applying a horizontal force $\overrightarrow{F}$ of magnitude $0.1 \,N$ the cube slides with a constant speed of $0.08 \,m/s$, then the coefficient of viscosity is

When stirring with a spoon is stopped in milk,it comes to rest after some time. Why?

$A$ metal plate of area $10^{-2} \,m^2$ rests on a layer of castor oil,$2 \times 10^{-3} \,m$ thick,whose coefficient of viscosity is $1.55 \,Ns\, m^{-2}$. The approximate horizontal force required to move the plate with a uniform speed of $3 \times 10^{-2} \,ms^{-1}$ is (in $N$)

$A$ plastic circular disc of radius $R$ is placed on a thin oil film,spread over a flat horizontal surface. The torque required to spin the disc about its central vertical axis with a constant angular velocity is proportional to

Write $SI$ and $CGS$ unit of coefficient of viscosity.

$A$ metal block of area $0.10 \; m^2$ is connected to a $0.010 \; kg$ mass via a string that passes over an ideal pulley (considered massless and frictionless),as shown in the figure. $A$ liquid with a film thickness of $0.30 \; mm$ is placed between the block and the table. When released,the block moves to the right with a constant speed of $0.085 \; m s^{-1}$. Find the coefficient of viscosity of the liquid.