Rubber Band: k = 5 N/m, 10 cm Extension
A rubber band approximated as a 5 N/m spring stretched 10 cm exerts a restoring force of 0.5 N.
How to use this tool
- Enter spring constant k and displacement x in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your restoring force f and the full breakdown beneath it.
A standard rubber band has a very low spring constant; even stretching it 10 cm only generates about 0.5 N of pull-back force.
Frequently asked questions
- What are typical spring constants?
- Car suspension: 10,000–50,000 N/m; pen spring: ~2 N/m; lab spring: 10–100 N/m; human Achilles tendon: ~1000 N/m.
- What does the negative sign mean?
- The restoring force always opposes the displacement, pulling back toward equilibrium. Stretch it right (+x) and the force acts left (−F).