$2\mathrm{.}32$ A block weighing $45$ N and having dimensions $250$ mm on

each edge is pulled up an inclined surface on which there is a film

of SAE $10$ W oil at $37C.$ If the speed of the block is $0\mathrm{.}6\frac{m}{s}$ and

the oil film is $0\mathrm{.}025$ mm thick, find the force required to pull the

block. Assume the velocity distribution in the oil film is linear.

The surface is inclined at an angle of $25$ from the horizontal.