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

question 34

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 38 rad/s.The wheel is run at that angular velocity for 30 s and then power is shut off.The wheel slows down uniformly at 2.1 rad/s² until the wheel stops.In this situation,the angular acceleration of the wheel between t = 0 s and t = 10 s is closest to:

• A)3.8 rad/s²
• B)4.6 rad/s²
• C)5.3 rad/s²
• D)6.1 rad/s²
• E)6.8 rad/s²

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Definitions:

Indian Removal Act

A law passed in 1830 that authorized the U.S. government to forcibly relocate Native American tribes from their ancestral homelands in the southeastern United States to designated territory west of the Mississippi River.

1830

A year marked by significant global events, including revolutions across Europe and the passage of the Indian Removal Act in the United States.

Frederick Jackson Turner

An American historian known for his "Frontier Thesis," which argued that the American democracy was largely formed by the American frontier.

Western Frontier

The geographical area of the United States west of the Mississippi River during the 19th century, known for its exploration, settlement, and expansion.