Which of the Following Is in Static Equilibrium

question 33

Multiple Choice

Which of the following is in static equilibrium?

• A)a rock resting on the ground
• B)a rock sliding at constant velocity across a frictionless surface
• C)a rock rotating in place on a frictionless surface
• D)a rock rotating at a constant rate as it slides at constant velocity across a frictionless surface
• E)a rock falling off a cliff

---

Definitions:

Long Run Adjustments

Changes made by firms or economies over time to adapt to market conditions, wherein all inputs can be varied and no factors are fixed.

Industry Profits

The total earnings generated by companies within a specific industry, after all costs and expenses are deducted.

Increasing-cost Industry

An industry in which the costs of production increase as the industry output increases, often due to the inputs' prices rising as demand for them grows.

Long-run Supply Curve

A graphical representation showing the quantities of goods that a producer is willing and able to supply over a period when all costs are variable.