Force & Extension - Springs

Hooke's Law - Extending Springs

A force acting on an object may change its size or shape. For example, squashing or twisting an object can change its shape.

Hooke's Law

When a spring is stretched, the increase in the length of the spring is called its “extension”.
Hooke’s Law tells us that the extension of a spring is directly proportional to the force applied to the spring:
force = spring constant x extension.

Limit of proportionality

Think of the spring constant as the stiffness of the spring. This is different for different objects.
The higher the spring constant, the “stiffer” the spring and the more force is needed to stretch it.
The limit of proportionality is the point where Hooke’s law breaks down.
If a spring is stretched too much, it will not return to its original length when the force stops acting on the spring.

1Biology

1.1Practicals

1.1.1Microscope & Bacteria

1.1.2Bacteria

1.1.3Osmosis Tests

1.1.4Osmosis & Food Tests

1.1.5Enzymes

1.1.6Enzymes 2

1.1.7Photosynthesis & Plant Responses

1.1.8Photosynthesis Experiments

1.1.9Reaction Time

1.1.10Quadrats

1.1.11Decay

2Chemistry

2.1Practicals

2.1.1Salts

2.1.2Neutralisation

2.1.3Titration

2.1.4Electrolysis

2.1.5Electrolysis 2

2.1.6Rate of Reaction

2.1.7Rate of Reaction 2

2.1.8Chromatography

2.1.9Identifying Gases

2.1.10Identifying Gases 2

2.1.11Identifying Ions

2.1.12Carbonates, Halides & Sulfates

2.1.13Flame Emission Spectroscopy

2.1.14Water Purification

2.1.15Water Purification 2

3Physics

3.1Practicals

3.1.1Specific Heat Capacity

3.1.2Thermal Capacity & Insulation

3.1.3Latent Heat

3.1.4Resistance & Current

3.1.5Resistance & Current 2

3.1.6Density

3.1.7Density 2

3.1.8Force & Extension - Springs

3.1.9Waves - Ripple Tank

3.1.10Light

3.1.11Light Reflection & Refraction

3.1.12Radiation

3.1.13Radiation 2

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