# Pulling Tape inside a fluid!

Classical Mechanics Level 3

During a coating process, a thin, flat tape of width $$w$$ is pulled through a channel of length $$L$$ containing a Newtonian fluid of density $$\rho$$ and dynamic viscosity $$\mu$$. The fluid is in contact with both sides of the tape. Estimate the force required to pull the tape through the channel if the tape has velocity $$v$$ and the channel has height $$H$$.

Note : You may assume that the tape is much thinner than $$H$$.

×