Question

force at a distance
a force is a push or a pull. forces occur when objects interact. there are two groups of forces: contact forces and forces - at - a - distance. contact forces are forces that result when two interacting objects are in physical contact with each other. examples include friction, air resistance, and applied forces.
forces - at - distance are forces that result even when the two objects are not in physical contact with each other, yet are able to exert a push or pull despite their physical separation. examples of action - at - a - distance forces include gravity, magnetism, and electrostatics.
slowly move the canisters closer together.
this experiment illustrates several important facts about forces that include all but one of those listed here.
a like charges repel or exert push.
b pushing forces can work at a distance
c like charges exert a pull from a distance.
d friction force can cause a transfer of charge.

Explanation:

The experiment shows charged canisters repelling (a push) without contact, demonstrating a force-at-a-distance (electrostatics).

• Option A: Matches, like charges repel (push) at a distance.
• Option B: Pushing forces are contact forces, so this is false.
• Option C: Like charges repel, not pull, so this is false.
• Option D: Friction transfers charge, but this experiment doesn't show that, so this is irrelevant/false.

The question asks for the fact NOT illustrated, so we identify the incorrect statement about the experiment.

Answer:

B. Pushing forces can work at a distance
C. Like charges exert a pull from a distance.
D. Friction force can cause a transfer of charge.