Required Information

Problem $02\mathrm{.}081-$ Block to be moved at a constant velocity

A $50-cm30-cm20-cm$ block weighing $190$ N is to be moved at a constant velocity of $1\mathrm{.}1\frac{m}{s}$ on an inclined surface with

a friction coefficient of $0\mathrm{.}27.$

Problem $02\mathrm{.}081.$b $-$ Force to push a block up on an inclined surface with an oil film

If a $0\mathrm{.}40-$mm$-$thick oll film with a dynamic viscosity of $0\mathrm{.}012$ Pa$-$s is applied between the block and the inclined surface, determine the

percent reduction in the required force.

The percent reduction in the required force is