An Object of Mass 20

question 22

Multiple Choice

An object of mass 20.0 kg is at rest at the top of an inclined plane whose length is 8.00 m and which makes an angle of 30.0° with the horizontal. The coefficient of kinetic friction between the object and the inclined plane is 0.400. The object is released and slides down the plane. What is the kinetic energy of this object at the bottom of the inclined plane? Use g = 10.0 m/s².

• A) 246 J
• B) 173 J
• C) 600 J
• D) 300 J
• E) 200 J

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Definitions:

Machine-Hours

A measurement of the amount of time a machine is operated, used as a basis for allocating machine-related costs to products.

Job-Order Costing

An accounting methodology that assigns costs to specific production batches or jobs, useful for custom or unique products.

Unit Product Cost

The calculated cost of a single unit of product that includes direct materials, direct labor, and manufacturing overhead.

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead costs to products or job orders, calculated before the period begins based on estimated costs and activity levels.