A Wheel Rotates About a Fixed Axis with an Initial

question 48

Multiple Choice

A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity increases to 40 rad/s. Assume that the angular acceleration was constant during the 5.0-s interval. How many revolutions does the wheel turn through during the 5.0-s interval?

• A) 20 rev
• B) 24 rev
• C) 32 rev
• D) 28 rev
• E) 39 rev

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Definitions:

Margin of Safety

The difference between actual sales and the break-even point, used to evaluate the level of risk in a business operation.

Break-even Sales

The amount of revenue required to cover total fixed and variable costs, at which point a business neither makes a profit nor incurs a loss.

Sales Units

The quantity of product sold, often used as a measure in assessing sales performance and operational efficiency.

Fixed Expenses

Costs that do not change with the level of production or sales over the short term, such as rent, salaries, and insurance.