Hooke's Law
In Exercises 9-14, use Hooke’s Law to determine the work done by the variable force in the spring problem.
A force of 20 pounds stretches a spring 9 inches in an exercise machine. Find the work done in stretching the spring 1 foot from its natural position.

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Hooke's Law
In Exercises 9-14, use Hooke’s Law to determine the work done by the variable force in the spring problem.
A force of 20 pounds stretches a spring 9 inches in an exercise machine. Find the work done in stretching the spring 1 foot from its natural position.

Hooke's Law

In Exercises 9-14, use Hooke’s Law to determine the work done by the variable force in the spring problem.

A force of 20 pounds stretches a spring 9 inches in an exercise machine. Find the work done in stretching the spring 1 foot from its natural position.

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Hooke's Law In Exercises 9-14, use Hooke’s Law to determine the work done by the variable force in the spring problem. A force of 20 pounds stretches a spring 9 inches in an exercise machine. Find the work done in stretching the spring 1 foot from its natural position.