In Which One of the Following Situations Is Zero Net

question 14

Multiple Choice

In which one of the following situations is zero net work done?

• A)A ball rolls down an inclined plane.
• B)A physics student stretches a spring.
• C)A projectile falls toward the surface of Earth.
• D)A box is pulled across a rough floor at constant velocity.
• E)A child pulls a toy across a rough surface causing it to accelerate.

---

Definitions:

Psychoactive Constituent

A chemical compound that crosses the blood-brain barrier and acts primarily upon the central nervous system where it affects brain function, resulting in alterations in perception, mood, consciousness, cognition, or behavior.

Cannabinoid

Compounds found in cannabis or produced naturally in the body that interact with cannabinoid receptors, affecting various physiological processes.

THC

Tetrahydrocannabinol, the main psychoactive compound in cannabis that produces the feeling of being high.

Limbic System

A complex system of nerves and networks in the brain, involved with instinct and mood. It controls the basic emotions (fear, pleasure, anger) and drives (hunger, sex, dominance, care of offspring).