Challenge of the Day
A new perspective. A little more thinking.
Same Earth.A different orbit.
A satellite raised to twice the orbital radius
A satellite moves from a circular orbit to a new orbit at twice the radius. What happens to its speed, energy and orbital period?
- Choose the model and state your assumptions.
- Compare the two circular orbital speeds.
- Explain why a transfer requires more than one burn.
Choose your challenge mode
Different ways to think, practise and enjoy physics.
Challenge by topic
Explore 2,528 original tasks across school and university physics.
Difficulty ladder
Choose your next step by the thinking it asks of you.
Recall the core idea. Build confidence.
Connect ideas in a familiar setting.
Choose a model. Test an assumption.
Compare models. Justify the limits.
A guide to learning demand; the challenge library contains stretch and extension tasks.
Interactive Challenge Studio
Explore, model and test your ideas with interactive tools.
Projectile motion lab
Make your prediction.
Launch from level ground. Change one input and explain what happens.
- Range
- 40.2 m
- Max. height
- 8.4 m
- Flight time
- 2.6 s
Ideal model: no air resistance, constant gravity, level landing.
01Learn the context
Clear the landing zone.
A rescue team needs to send a supply capsule across open ground. Predict where it will land before you launch.
Try this: keep the speed fixed and compare 30° with 60°. What stays the same?
Featured challenge sets
A good starting point for your next session.
Motion FoundationsFrom graphs to projectilesIGCSE · A-Level →
Circuit ReasoningTrace charge and energyIGCSE · A-Level →
Waves & DataRead the evidenceA-Level · IB →
Atomic & NuclearSmall scales, big ideasA-Level · IB →
University MechanicsBuild a deeper modelCalculus-based →Beyond the ClassroomExplore the universeUniversity physics →Games that teach the same ideas
Physics in action. Games are a place to explore, make mistakes and try again.
Crane Loader
Energy Budget
Cyclotron Run
Phase ChaseHow to make each attempt count
Predict firstWhat do you expect, and why?
Draw your modelUse a diagram, equation or graph.
Explain the physicsWrite a clear, logical argument.
Compare and retryLearn from mistakes and improve.
Find your topic 1,441 topic pathways+
1441 topic pathways available
Topic areas can overlap. All tasks are original GioPhysics enrichment; they are not official past papers.
Exam preparation
Turn practice into performance.
For teachers and parents
Support independent thinking with worked reasoning and purposeful practice.
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