Question

which statement accurately describes a balanced force?
a 25 - n force acts on the left side of the marble at the same time as a 25 - n force acts on the right side of the marble
a marble rolling downhill suddenly comes to rest at a garden wall.
a marble resting on the sidewalk suddenly begins to roll downhill without being touched.
a 2 - n force presses down on the marble at the same time as a 1.5 - n force presses up on the marble

Explanation:

Balanced forces are equal in magnitude, opposite in direction, and act on the same object, resulting in no net force (so no change in motion). Option A has two 25-N forces opposite each other on the marble—equal magnitude, opposite direction, same object. Other options involve unbalanced forces (change in motion: stopping, starting, net force from unequal up/down forces).

Answer:

A. A 25-N force acts on the left side of the marble at the same time as a 25-N force acts on the right side of the marble.