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:

Probability Distribution

A statistical function that describes all the possible values and likelihoods that a random variable can take within a given range.

Reservation Price

The highest price a person is prepared to spend on a product or service.

English Auction

A bidding process where the price ascends and the highest bid wins, commonly used in auction houses and online marketplaces.

Willingness To Pay

The maximum amount an individual is prepared to spend on a good or service, reflecting the perceived value.