If $4 \mathrm {~J}$ Of Work Are Needed to Stretch a Spring From

question 145

Short Answer

If $4 \mathrm {~J}$ of work are needed to stretch a spring from $10 \mathrm {~cm}$ to $12 \mathrm {~cm}$ and another $20 \mathrm {~J}$ are needed to stretch it from $12 \mathrm {~cm}$ to $14 \mathrm {~cm}$ , what is the natural length of the spring? Round the answer to nearest integer.

---

Definitions:

Contact Motive

A psychological need or drive to seek and maintain physical or emotional closeness with others.

Cloth "Mother"

A reference to Harry Harlow's experiments with rhesus monkeys, where he demonstrated the importance of caregiving and companionship in social and cognitive development.

Wire "Mother"

A term referring to an experiment by Harry Harlow, showing infant monkeys preferred a cloth surrogate mother over a wire one that provided food, highlighting the importance of comfort and security.

Harry Harlow

An American psychologist best known for his maternal-separation and social isolation experiments on rhesus monkeys, which highlighted the importance of caregiving and companionship.