Final answer:
The statement regarding the cessation of force when control is established in physics is true; once an object's motion is controlled, further force is unnecessary as per Newton's first law.
Step-by-step explanation:
The statement 'Necessary force must cease when control has been established' is true. In the context of physics and particularly when examining Newton's laws of motion, once the desired state of control over an object's motion has been achieved, the force that was applied to change that state is no longer necessary. According to Newton's first law, an object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an external force. Thus, once an object is controlled and in the desired state of motion, any additional force would alter that state, which is unnecessary if control is already established.