A 400-N Uniform Vertical Boom Is Attached to the Ceiling

question 27

Multiple Choice

A 400-N uniform vertical boom is attached to the ceiling by a hinge, as shown. An 800-N weight W and a horizontal guy wire are attached to the lower end of the boom as indicated. The pulley is massless and frictionless. The tension force T of the horizontal guy wire has magnitude:

• A) 340 N
• B) 400 N
• C) 690 N
• D) 800 N
• E) 1200 N

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Definitions:

Treatment Variable

A variable manipulated by researchers in an experiment to determine its effect on an outcome measure; also known as the independent variable.

Testable Hypotheses

Statements that make predictions about the relationship between variables, which can be empirically tested through scientific research.

Hypothesis-Testing Approach

A method in research that involves making predictions, formulating a hypothesis, and then empirically testing it.

Nonmanipulated Independent Variable

A variable in a research study that occurs naturally without any intervention or control by the researcher.