Question

collision forces quick check
how will an object at rest be affected if multiple forces working on it are opposed but unbalanced?
(1 point)
○ motion will be either created, stopped or changed.
○ the mass of the object will decrease.
○ the acceleration of the object will increase.
○ the unbalanced forces will cause the object to produce a humming sound.

Explanation:

To solve this, we recall Newton's laws of motion. Unbalanced forces on an object at rest (net force ≠ 0) cause a change in motion.

• The mass of an object doesn't decrease due to forces (mass is intrinsic), so the second option is wrong.
• Acceleration depends on net force (\(F = ma\)), but the option says "acceleration will increase" without context (we don't know if force is increasing), so it's incorrect.
• Unbalanced forces don't cause humming sounds, so the last option is wrong.
• Unbalanced forces create, stop, or change motion (e.g., a push on a stationary box with unbalanced forces makes it move, or changes direction/speed of a moving object). So the first option is correct.

Answer:

A. Motion will be either created, stopped or changed.