You Push Your Physics Book Across a Table

question 20

Multiple Choice

You push your physics book across a table. The book weighs 8 N, you push with a steady 5 N force, and the force of friction against the book is 3 N. You push the book a distance of 2 m. The amount of work you do on the book is

• A) 6 J.
• B) 10 J.
• C) zero.
• D) 16 J.
• E) impossible to tell without more information.

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Definitions:

Validity

refers to the degree to which a tool, test, or research accurately measures what it is intended to measure.

Reliability

The consistency of a measure or test over time, ensuring that repeated experiments or trials yield similar results.

Spuriousness

A relationship between two variables that appears to be causal but is actually due to both variables being influenced by one or more other variables.

Interpretations

The act of explaining or making sense of something, such as a text, action, or event.