A Thin, Massless String Is Wrapped Around a 0

question 25

Multiple Choice

A thin, massless string is wrapped around a 0.25m radius grindstone supported by bearings that produce negligible frictional torque. A steady tension of 20 N in the string causes the grindstone to move from rest to a speed of 60 rad/s in 12s. The moment of inertia of the grindstone is

• A) 1.0 kg · m²
• B) 2.0 kg · m²
• C) 3.0 kg · m²
• D) 4.0 kg · m²
• E) 5.0 kg · m²

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Definitions:

Total Cost

The sum of all expenditures incurred in the production of goods or services, including fixed and variable costs.

Diseconomies of Scale

The phenomenon where production costs increase as a firm's output expands, leading to inefficiencies.

Long-Run Average Total Cost

The average cost per unit of output when all factors of production, including capital, are variable in the long term.

Slope

In mathematics, the slope of a line is a number that describes both the direction and the steepness of the line.