How will an object at rest be affected if multiple forces working on it are opposed but unbalanced?

Question

Responses

The mass of the object will decrease.
The mass of the object will decrease. - no response given

The acceleration of the object will increase.
The acceleration of the object will increase. - no response given

Motion will be either created, stopped or changed.
Motion will be either created, stopped or changed. - no response given

The unbalanced forces will cause the object to produce a humming sound.

Answer 1

When multiple forces are acting on an object at rest and those forces are opposed but unbalanced, the correct response is:

Motion will be either created, stopped, or changed.

An unbalanced force acting on an object will result in a net force that can cause the object to move (if it was at rest), change its velocity, or change its direction of motion. The mass of the object will not decrease as a result of these forces.