Description
Springs play an important role in many contexts, not only mechanics. However, springs that have zero initial tension are hard to find – most springs you get in hardware stores require a minimum force applied before they begin to extent. For students trying to measure forces or understanding Hooke's law, this can be quite confusing.
Ciênsação springs have zero initial tension and are designed to measure small forces up to 1.5 N, which corresponds to ca. 150g attached weight. To observe harmonic oscillations, for instance, you can attach a typical 100g chocolate bar – something your students can relate to and will remember.
The springs have double loop hooks at both ends, so that your students can hold them with regular pencils. We chose closed hooks, because we repeatedly lost the attached weight in oscillation experiments when using open hooks.
Experiments
Springs are often used in physics and engineering as simple model for complex phenomena. It therefore really helps to have developed 'a feeling' for these basic systems – ideally first hand.
Observing the linear relationship between a spring's extension and the applied force is a classical experiment, everyone should have done. However, when using a normal tension spring from a hardware store, your students might be in for a surprise...
It makes a difference to read about resonance and to feel it for yourself. Grant your students this haptic experience. It will come in handy whenever you use springs to model more complex systems.
Specification
Details of a single spring:
| Length |
100 mm |
| Diameter |
9 mm |
| Spring constant |
0.0057 N/mm |
| Hook |
double loop, fits most pencils |
| Material |
stainless steel |
| Maximal load |
1.5 N or 150g weight |
| Weight |
6.83 g |
Sets
For your information, these are the prices of a single spring in different sets:
| Personal |
0.800€ |
| Small Class Set |
0.572€ |
| Regular Class Set |
0.498€ |
In case you prefer a different set size, you can order multiple personal sets – if the overall size exceeds the limits for small or regular class sets, the unit price is automatically adjusted. Please avoid combining different set sizes of the same product, since the system will not be able to adjust unit prices accordingly.
Our primary goal is to put science into the hands of school kids. These prices are therefore optimized for class sets, assuming a regular class size of up to 32 students, working in small groups of 3 students each. To provide 2 springs to each of the eleven groups and 2 for you as teacher (or, if needed, as spare parts), the regular class set contains 24 springs.
By paying a bit more for a personal set, you help us to offer class sets at a low price.
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Shipping &Tax
Getting a feeling for spring systems
Hooke's law
Mechanical resonance
