A Ceiling Fan Is Turned on and Reaches an Angular

question 55

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 60 s.The ratio of the average angular acceleration for the first 20 s to that for the last 60 s is which of the following?

• A) 3
• B) -3
• C) 0.3
• D) -0.3

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Definitions:

Compounded Annually

The method of computing interest that includes both the original amount invested and the interest already earned on that amount each year.

Simple Interest

Interest calculated based only on the principal amount, ignoring the effect of compounding.

Interest

The cost of borrowing money or the return on investment for savings and investments, often expressed as a percentage.

Compounded Annually

Calculating interest on both the initial principal and the accumulated interest from previous periods on an annual basis.