A Jack System Will Increase the Potential Energy of a Heavy

question 14

Multiple Choice

A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J.The efficiency of the jack system is

• A)10%.
• B)20%.
• C)50%.
• D)80%.
• E)Not enough information is given.

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Definitions:

Overpopulation

A situation where the number of people exceeds the capacity of the environment to support life at a decent standard of living.

Scarcity Of Land

The limited availability of land resources relative to demand, often leading to competition and increased value.

Welfare Systems

Government programs designed to support the well-being of the population by providing assistance for those unable to support themselves financially or otherwise.

Blue-collar Work

Jobs involving manual labor or skilled trades, typically requiring physical effort and not traditionally office-based.