Work Done by Variable Forces: It Requires 49 J of Work

question 33

Multiple Choice

Work done by variable forces: It requires 49 J of work to stretch an ideal very light spring from a length of 1.4 m to a length of 2.9 m. What is the value of the spring constant of this spring?

• A) 15 N/m
• B) 44 N/m
• C) 29 N/m
• D) 22 N/m

---

Definitions:

Prior Service Credit

A pension plan feature that grants employees credit for service periods before the commencement of the pension plan, affecting their benefits.

Defined Benefit Pension Plan

A retirement plan where the benefits that an employee will receive upon retirement are defined based on a formula considering factors such as salary history and duration of employment.

Service Cost

The portion of the pension expense that is recognized for the increase in pension benefits related to employee services of the current period.