The $10-$lb block has an initial velocity v$1=2$ ft$/$s along a $10$ deg slope. If the constant $20-$lb force $($at an angle $30$ deg with respect to the slope$)$ pushes the block $8$ ft down the slope, determine the final velocity v$2($in ft$/$s$)$ at the end of the $8\text{'}$ push. The $20-$lb force is always acting on the block during the entire $8\text{'}$ journey. The $8\text{'}$ distance is measured from box center to box center. Friction coefficients are indicated$\mathrm{.}201b,v_1=2b\frac{t}{s},g$