A 100-Kg Block Is Pushed Up a 30 ^o

question 66

Multiple Choice

A 100-kg block is pushed up a 30 ^o incline that is 10 m long. If the coefficient of friction between the block and the incline is 0.1, the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 s is approximately

• A) 0.49 kN.
• B) 0.085 kN.
• C) 0.22 kN.
• D) 0.80 kN.
• E) 0.58 kN.

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Definitions:

Degrees of Freedom

The number of independent values or quantities that can be assigned to a statistical distribution.

F Statistic

A ratio used in ANOVA tests to determine if the means between two or more groups are significantly different.

Null Hypotheses

Postulates that assume no variance between specified variables in a study, used for statistical testing.

Research Hypotheses

Statements made by researchers that predict a relationship between two or more variables.