A Machinist Turns on the Power on to a Grinding $1.4 \mathrm { rad } / \mathrm { s } ^ { 2 }$

question 108

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 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 $1.4 \mathrm { rad } / \mathrm { s } ^ { 2 }$ until the wheel stops. What is the total number of revolutions made by the wheel in this situation?

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

---

Definitions:

Countries

Distinct territorial bodies or nations recognized as independent states, with their own governments and specific geographic boundaries.

Modern Medicine

A system of healthcare based on the application of scientific knowledge, including diagnosis, treatment, and prevention of disease.

High-tech Cures

Advanced medical treatments and solutions developed through cutting-edge technology and research.

Emergency Room

A specialized department within a hospital that provides immediate treatment for acute and urgent illnesses and injuries, operating 24/7 to address emergency medical needs.