A Crane with an Efficiency of 0

question 35

Multiple Choice

A crane with an efficiency of 0.8 takes 20 s to lift a load of 50 kg to a height of 200 m.How much power does it take to run the crane (within 5% accuracy) ?

• A)4.9·10³ W
• B)6.1·10³ W
• C)1.0·10⁵ W
• D)1.2·10⁵ W
• E)2.4·10⁶ W

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Definitions:

Reference Group

A social group that an individual uses as a standard for evaluating their own behaviors, beliefs, or attitudes.

Instrumentality

In motivation theory, the perceived relationship between performance and outcomes.

Performance

The act of carrying out or accomplishing a task or function, often evaluated against pre-established criteria or objectives.

Effort

The amount of physical or mental energy put into a task or activity to achieve a desired outcome or result.