Two Masses Are Suspended by a Cord That Passes Over

question 106

Multiple Choice

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m₁, has a mass of 7.0 kg and the other mass, m₂, has a mass of 3.0 kg. The pulley turns on a shaft through the center of the pulley, which supports the pulley and all the masses. The vertical force of the shaft on the pulley is

• A) 49 N upward.
• B) 49 N downward.
• C) 82 N upward.
• D) 82 N downward.
• E) 98 N upward.

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Definitions:

F Table

A chart used in statistics that provides critical values for the F-distribution, helpful in analyzing variances by comparing the ratio of two sets of data.

Degrees Of Freedom

The number of independent values in a statistical calculation that can vary without violating the calculation's constraints.

F Distribution

A probability distribution used in analysis of variance (ANOVA), particularly in the context of comparing variances across different groups.

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, often reflecting the number of independent pieces of information.