A 8-Kg Object Moves Vertically a Distance of 3 M

question 27

Multiple Choice

A 8-kg object moves vertically a distance of 3 m. Its potential energy has changed by approximately how much?

• A) It has increased by 24 J.
• B) It has decreased by 240 J.
• C) It has decreased by 24 J.
• D) It has increased by 240 J.

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Definitions:

Efficiency

The ability to accomplish a task with the least waste of time and effort.

Effectiveness

The degree to which a procedure, when used under usual or everyday conditions, achieves the intended effect or results, distinguishing it from efficacy, which is measured under idealized conditions.

Efficacy

The ability to produce a desired or intended result.

Power

The probability that a test will correctly reject a false null hypothesis; in other words, the ability of a study to detect an effect if there is one.