A Uniform Wooden Plank Floats in a Swimming Pool

question 55

Multiple Choice

A uniform wooden plank floats in a swimming pool. The plank weighs 100 pounds, and exactly 10% of its volume is above the waterline. The maximum weight of iron which could be suspended from underneath the plank without causing the whole combination to sink to the bottom of the pool is

• A) exactly 10 pounds.
• B) somewhat more than 10 pounds.
• C) somewhat less than 10 pounds.
• D) more information is needed.

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Definitions:

Competition

The activity or condition of striving to gain or win something by defeating or establishing superiority over others.

Realistic Conflict Theory

A social psychology theory that suggests intergroup conflicts arise from competition over limited resources.

Prejudice

Preconceived opinion that is not based on reason or actual experience.

Segregation

The enforced separation of different racial groups in a country, community, or establishment.