A spherical solid particle of $1\: mm$ diameter is falling with a downward velocity of $1.7\:mm/s$ through a liquid (viscosity $0.04\: Pa.s$) at a low Reynolds number Stokes regime). The liquid is flowing upward at a velocity of $1\: mm/s$. All velocities are with respect to a stationary reference frame. Neglecting the wall effects, the drag force per min projected area or the particle, in $Pa$, (up to two decimal places) is ____________.
