A Car's Engine Is 20% Efficient

question 97

Multiple Choice

A car's engine is 20% efficient. When cruising, the car encounters an average retarding force of 1000 N. If the energy content of gasoline is 40 megajoules per liter, how many kilometers per liter does
The car get?

• A) 12
• B) 8
• C) 10
• D) 14
• E) none of these

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Definitions:

Problem

A situation, question, or issue that presents difficulty or uncertainty and necessitates a solution or answer.

Insight

A deep understanding of a person or situation, often resulting in a clear and sometimes sudden discernment of a solution to a problem.

Fixation

An obsessive focus or attachment to certain behaviors, people, or developmental stages, often hindering emotional development.

Mental Set

A cognitive tendency to approach situations in a fixed way based on previous experiences, potentially inhibiting problem-solving.