A Ceiling Fan Is Turned on and Reaches an Angular

question 83

Multiple Choice

A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s.It is then turned off and coasts to a stop in an additional 40 s.The ratio of the average angular acceleration for the first 20 s to that for the last 40 s is which of the following?

• A) 2
• B) 0.5
• C) −0.5
• D) −2

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Definitions:

Plaster

A mixture of lime, sand, water, and sometimes other materials, applied to walls and ceilings to create a smooth or decorative surface.

Labor

The effort by humans to produce goods or provide services in exchange for wages or salary.

Equilibrium Price

The price at which the quantity of a good or service demanded equals the quantity supplied, leading to market balance.

Interest Rate

The percentage of an amount of money charged for its use over a specified period of time, often expressed as an annual percentage.