When a Force Is Called a "Normal" Force, It Is

question 79

Multiple Choice

When a force is called a "normal" force, it is

• A) the usual force expected given the arrangement of a system.
• B) a force that is perpendicular to the surface of the Earth at any given location.
• C) a force that is always vertical.
• D) a contact force perpendicular to the contact surfaces between two objects.
• E) the net force acting on a system.

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Definitions:

Market

A system or an area where buyers and sellers interact to trade goods, services, or financial instruments.

Positive Externality

A benefit gained by a third party not directly involved in a transaction or activity, where the social or economic gain is not reflected in the market price.

Social Planner

A theoretical decision-maker in economics who aims to achieve optimal outcomes for society by considering the allocation of resources and distribution of goods and services.

Subsidy

A payment made by the government to a firm, industry, or individual, usually to encourage the production of a certain good or service or to reduce its price for consumers.