Physics · Lesson Worlds
Springs: interactive science lab
Stiffen the spring or change the mass and prove that a tighter coil bounces faster.
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What will you learn?
A stiffer spring oscillates faster. A heavier mass oscillates slower.
How does the lab work?
Observe the simulation, make a prediction, change a variable, run the experiment, and explain the result. Finish with a challenge that tests your understanding.
You can change: Stiffness, Mass. Compare what happens and connect the result to the scientific explanation.
Try a comparison in Springs
Start with the lab’s initial settings. Choose one control below, predict the result, and change that control while keeping the others fixed. Record the setting and what you observe before making a second change.
- Stiffness: the lab starts at 12 N/m; its available range is 4–36 N/m.
- Mass: the lab starts at 1 kg; its available range is 0.4–3 kg.
For a named starting condition, try Soft, Room, Stiff. A preset can change several settings: check the controls before treating two presets as a one-variable comparison.
Questions to discuss during the activity
- Watch what happens. The coil stores a push, then gives it back. Watch the mass bob on the coil.
- Name the cause. More stretch, more restoring force. A stiffer spring yanks harder, so the trip is quicker. A heavier mass is harder to accelerate, so it is slower. Stiffness sets how quickly it returns.
- Change something. Raise k and the bob should hurry. Change stiffness, then release.
- Guess before you run. If we stiffen the spring to 28 N/m, the bob will… Guess what will happen, then run to check.
After your comparison, explain how the observations connect to this idea: A stiffer spring oscillates faster. A heavier mass oscillates slower. Name one condition you held fixed and one feature of the real world this model simplifies. A completed run is a starting point for discussion, rather than proof of mastery.
Who is it for?
Curious learners exploring physics. A parent or teacher can help younger learners read the instructions and discuss the results. Choose by topic and prior knowledge rather than a fixed grade level.
Is this lab free?
Yes. This interactive lab is free without signing in or a paid membership.
No app download is needed; interactive play requires JavaScript and a modern browser.
Use this activity with a learner
Families and educators · choose by prior knowledge
Learning goal: A stiffer spring oscillates faster. A heavier mass oscillates slower.
Before you begin: Read the controls for Stiffness, Mass. Make one prediction before changing a setting.
Check understanding: Ask for one observation, the evidence that supports it, and a question to investigate next.
A simulation simplifies the real world. Explain which conditions stayed fixed; a successful run alone does not demonstrate mastery.
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