If the $12-$lb block A slides down the plane

with a constant velocity when $=30,,$

determine the acceleration of the block

when $=45.$

Free body @ $=30($ pt $)$

Free body $3=45(1pt)$

Equations of motion @ $=30(2$ pts$)$

Value of $N(1$ pt$).$

Equations of motion $($i$)6=45(2$ pts$)$

Value of $k(7pt)$

Value of $N(1$ pt$)$

Valise of a $(pt$