A Certain Wheel Has a Rotational Inertia of 12 Kg∙m²

question 15

Multiple Choice

A certain wheel has a rotational inertia of 12 kg∙m².As it turns through 5.0 rev its angular velocity increases from 5.0 rad/s to 6.0 rad/s.If the net torque is constant its value is:

• A)0.015 N∙m
• B)0.18 N∙m
• C)0.57 N∙m
• D)2.1 N∙m
• E)13 N∙m

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Definitions:

Variable Overhead Efficiency Variance

The difference between the actual level of activity (direct labor-hours, machine-hours, or some other base) and the standard activity allowed, multiplied by the variable part of the predetermined overhead rate.

Predetermined Overhead Rate

An estimated rate used to allocate manufacturing overhead costs to individual units of production, based on activity levels such as labor hours or machine hours.

Actual Level Of Activity

The real measure of how much work is performed or output is produced in a given period, often compared to planned or standard levels of activity.

Standard Activity

A benchmark or base level of activity used for planning, measuring, and controlling performance.