Read the article and answer the questions. The picture shows the working principle of the mousetrap. Viewed from the side, it is the three levers that restrict each other, and F 1 is the spring that a

Read the article and answer the questions. The picture shows the working principle of the mousetrap. Viewed from the side, it is the three levers that restrict each other, and F 1 is the spring that acts on the mousetrap. (1) It can be seen from the working process of the mousetrap described in the title that the mousetrap is made by using the lever principle;

(2) Clamping bar A exerts a force on clamping bar B, which is mutual, and clamping bar B also exerts a force on clamping bar A, and clamping bar A and clamping bar B are a pair of interactive forces;

(3) When a mouse strongly acts on the bait, the three levers change from static to moving almost at the same time, and the moving state changes due to the unbalanced force;

(4) As can be seen from the figure, the force of the clamping rod A and the spring is resistance, the force of the clamping rod B is power, and the power arm is larger than the resistance arm, which is a labor-saving lever;

Clamping rod B, clamping rod A play a resistance role, clamping rod C plays a power role, and the power arm is larger than the resistance arm, which is a labor-saving lever.

So the answer is: (1) leverage; (2) interaction force; (3) change; Unbalanced force; (4) saving labor; Save effort.