A Machinist Turns the Power on to a Grinding Wheel

question 17

Multiple Choice

A machinist turns the power on to a grinding wheel, which is at rest at time t = 0.00 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 25 rad/s. The wheel is run at that angular velocity for 37 s and then power is shut off. The wheel decelerates uniformly at 1.5 rad/s² until the wheel stops. In this situation, the time interval of angular deceleration (slowing down) is closest to:

• A) 17 s
• B) 15 s
• C) 19 s
• D) 21 s
• E) 23 s

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Definitions:

Oblique Section

A type of anatomical slice or section that is cut at an angle to the main axis of an organ or part of the body, providing a view that is between transverse and longitudinal.

Histological Sections

Histological sections are thin slices of tissue prepared for examination under a microscope to study the microanatomy of cells and tissues.

Tissue

Groups of cells with similar structures and functions that work together to perform specific activities in the body.

Keratinized

Keratinized refers to cells, especially those in the skin, nails, and hair, that become filled with keratin protein, providing a tough and protective property.