A 320-G Mass and a 400-G Mass Are Attached to the Two

question 78

Multiple Choice

A 320-g mass and a 400-g mass are attached to the two ends of a string that goes over a pulley with a radius of 8.70 cm. Because of friction, the pulley does not begin to rotate. What is the magnitude of the frictional torque on the bearing of the pulley if the system is in static equilibrium?

• A) 0.00683 Nm
• B) 0.614 Nm
• C) 0.0787 Nm
• D) 0.0626 Nm
• E) 0.000696 Nm

---

Definitions:

Sampling Distribution

The probability distribution of a statistic (e.g., the mean) obtained from a large number of samples drawn from a specific population.

Standard Deviation

A measure of the dispersion of a set of data from its mean, indicating how spread out the data points are.

Standard Deviation

A statistic that quantifies the amount of variation or dispersion of a set of data values.

Sample Size

The number of individual observations or data points used in a statistical sample.