A 22-Kg Block Starts from Rest on a Rough Inclined Plane

question 35

Multiple Choice

A 2.2-kg block starts from rest on a rough inclined plane that makes an angle of 25 ° with the horizontal. The coefficient of kinetic friction is 0.25. As the block goes 2.0 m down the plane, the mechanical energy of the Earth-block system changes by:

• A) 0
• B) -9.8 J
• C) 9.8 J
• D) -18 J
• E) 18 J

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Definitions:

Break-even Sales

The amount of revenue needed to cover both the fixed and variable costs of a business, resulting in no profit or loss.

Unit Selling Price

The price at which a single unit of product is sold, not including any discounts or promotions.

Unit Variable Costs

The variable costs associated with producing one unit of a product, including materials, labor, and any other variable expenses.

Break-even Point

The level of sales at which a company neither makes a profit nor incurs a loss, indicating the minimum market performance needed to cover all expenses.