A Rotating Flywheel Can Be Used as a Method to Store

question 18

Multiple Choice

A rotating flywheel can be used as a method to store energy.If it has 2.00 × 10⁶ J of kinetic energy when rotating at 400 rad/s,and if a frictional torque of 4.00 N
M acts on the system,in what interval of time would the flywheel come to rest?

• A)2 500 min
• B)41.7 min
• C)25.0 min
• D)167 min

---

Definitions:

Direct Labor-hours

The total hours of labor directly involved in the production of goods or services.

Variable Manufacturing Overhead

comprises manufacturing costs that vary directly with the level of production, such as materials and labor.

Direct Labor-hours

The all-encompassing total of work hours by staff directly partaking in manufacturing roles.

Variable Overhead Efficiency Variance

The difference between the actual variable overhead incurred and the standard cost based on the actual level of activity output.