A Machinist Turns the Power on to a Grinding Wheel,at

question 5

Multiple Choice

A machinist turns the power on to a grinding wheel,at rest,at time t = 0 s.The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s.The wheel is run at that angular velocity for 40 s and then power is shut off.The wheel slows down uniformly at 1.5 rad/s² until the wheel stops.In this situation,the time interval of deceleration is closest to:

• A)64 s
• B)62 s
• C)66 s
• D)68 s
• E)70 s

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Definitions:

Field Independence

A cognitive style in which individuals can easily separate details from the surrounding context, often performing well in tasks requiring finding a figure embedded in a background.

Number Facility

The ability to easily understand numbers and mathematical concepts, including performing mathematical operations.

Arithmetic Operations

Basic mathematical procedures including addition, subtraction, multiplication, and division, fundamental for quantitative reasoning.

Syllogistic Reasoning

Reasoning with problems concerning relationships among categories (e.g., “All A are B; some B are C; therefore, some A are C”).