As can be seen from the figure, point O is the fulcrum, OA is the power arm, OB is the resistance arm, the resistance is equal to the gravity of the suspended object, and the pulling force at point A is the power;

(1) According to the equilibrium condition of lever F 1L 1=F2L2, f1= 30n× 0.4m0.3m = 40n;

(2) Because OB is greater than OA, that is, the power arm is smaller than the resistance arm, it is a laborious lever.

So the answer is: 40; Thanks for your hard work.