A Machinist Turns on the Power on to a Grinding $58 \mathrm { rad } / \mathrm { s }$

question 79

Multiple Choice

A machinist turns on the power on to a grinding wheel at time t = 0 s. The wheel accelerates uniformly from rest for 10 s and reaches the operating angular speed of $58 \mathrm { rad } / \mathrm { s }$ The wheel is run at that angular velocity for 30 s, and then power is shut off. The wheel slows down uniformly at $1.4 \mathrm { rad } / \mathrm { s } ^ { 2 }$ until the wheel stops. What is the total number of revolutions made by the wheel in this situation?

• A)510
• B)280
• C)320
• D)470
• E)750

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Definitions:

Clerical Employees

Workers who perform administrative and office functions, such as typing, filing, and managing records.

Groundskeepers

Individuals responsible for the maintenance and landscaping of outdoor environments, such as parks, gardens, or sports fields.

Union Instrumentality

The perceived effectiveness of labor unions in achieving desired outcomes for their members, such as better wages and working conditions.

Positive Work Aspects

Features of a job or workplace that contribute to employee satisfaction and motivation.