A Machinist Turns on the Power to a Grinding Wheel $38 \mathrm { rad } / \mathrm { s }$

question 23

Multiple Choice

A machinist turns on the power 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 $38 \mathrm { rad } / \mathrm { s }$ The wheel is run at that angular speed 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,what is the angular acceleration of the wheel between t = 0 and t = 10s?

• A)3.8 rad/ \(\mathrm { s }^2\)
• B)4.6 rad/ \(\mathrm { s }^2\)
• C)5.3 rad/ \(\mathrm { s }^2\)
• D)6.1 rad/ \(\mathrm { s }^2\)
• E)6.8 rad/ \(\mathrm { s }^2\)

---

Definitions:

Exceptional Boards

Governing bodies of organizations that are highly effective in providing strategic direction, oversight, and support to ensure success and mission fulfillment.

Core Values

Fundamental beliefs or principles that are central to an organization's identity and guide its decisions, actions, and culture.

BoardSource

An organization that specializes in providing support, resources, and training for nonprofit board officers and directors.

Finance Committee

A subgroup within an organization, typically composed of members of its governing body, responsible for overseeing financial policies, strategies, and health.