Hooke’s Law and Elastic Potential Energy Flashcards

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What does Hooke's Law state?

The extension of a spring is directly proportional to the force applied, up to the limit of proportionality.

What is the equation linking force, spring constant, and extension?

F = k e.

What are the units for force, spring constant, and extension in Hooke's Law?

Force in newtons (N), spring constant in newtons per metre (N/m), extension in metres (m).

What does a larger spring constant k tell you about a spring?

The spring is stiffer and needs more force for the same extension.

How do you find a spring's extension in a practical?

Measure the new length and subtract the original length: extension = stretched length − original length.

On a force-extension graph, what does the gradient represent?

The spring constant k.

What is the limit of proportionality?

The point where extension is no longer directly proportional to force; the graph stops being a straight line.

What is elastic deformation?

The object returns to its original length when the force is removed.

What is inelastic deformation?

The object does not return fully to its original length; it is permanently changed.

What is the equation for elastic potential energy stored in a spring?

Ee = 1/2 k e^2.

What is the unit of elastic potential energy?

Joules (J).

How can you find the elastic potential energy from a force-extension graph?

It is the area under the graph up to the extension.