(20 14? In the state of weightlessness in space, if a force is applied to a simple pendulum ball, the ball will make a circular motion. For this phenomenon, let's talk about it below.

A, the ball is static, if a force is applied to the simple pendulum ball, the ball will make a circular motion, which means that the force changes the motion state of the object, so A is correct;

B, the ball moves in a circular motion, and the motion state changes constantly, so the ball is bound to be affected by unbalanced force, so B is correct;

C, when the ball leaves the finger, because the inertial ball continues to move, the force exerted by the finger on the ball does not do work on the ball at this time, so c is wrong;

D, because the ball is in weightlessness, it is only pulled by the rope when it rotates, so D is correct.

So choose C.