A 200-Kg Box Is Placed on a Ramp

question 22

Multiple Choice

A 200-kg box is placed on a ramp.As one end of the ramp is raised,the box begins to move downward just as the angle of inclination reaches 18.0°.What is the coefficient of static friction between box and ramp?

• A)0.42
• B)0.32
• C)3.1
• D)0.27
• E)62

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Definitions:

Single-blind Study

A study design where the participants do not know which group (experimental or control) they are in to prevent bias, but the researchers do.

Descriptive Research

A research method aimed at describing characteristics of a population or phenomenon being studied without influencing those characteristics.

Representative Sample

A smaller group taken from a larger population that truly represents all members of that population.

Scientific American

A popular science magazine that features articles on various scientific topics for a general audience.