Question

After walking across a carpeted floor in socks, Jim brings his finger near a metal doorknob and receives a shock.



This demonstrates that
A.
frictional forces require direct contact.
B.
electric forces require direct contact.
C.
frictional forces act at a distance.
D.
electric forces can act at a distance

Answer 1

The scenario described demonstrates that electric forces can act at a distance. When Jim walks across the carpet, he accumulates static electricity due to the friction between his socks and the carpet. When he brings his finger near the metal doorknob, the accumulated charge can create a spark, which is an example of an electric force acting at a distance.

Therefore, the correct answer is:

**D. electric forces can act at a distance.**