Action-at-a-distance forces are defined as forces that do not require direct contact to affect an object.

Action-at-a-distance forces are defined as forces that do not require direct contact to affect an object.

• A. They do not require direct contact.
• B. They require direct contact to affect an object.
• C. They always require a medium to propagate.
• D. They only occur when objects touch.

Answer: (A)