Use the same start
Keep the starting speed the same when comparing surfaces.
Friction Playground
Advance a sliding object across different surfaces and compare how quickly it stops.
Grades 3–5 · Physics
Your goal
Choose a surface so the cart travels more than 30 m. Start it and observe it all the way to a stop.
Reduced motion is on. The controls still update the scene.
Wood is selected. All carts are ready with the same starting speed of 6 m/s. It stops after 3.06 s over 9.18 m in this model.
s
These are sliding carts without rolling wheels. Friction is constant during sliding, with example coefficients of 0.05 for ice, 0.20 for wood and 0.60 for rug. Real surfaces vary. All lanes share one time and distance scale. Air resistance is ignored.
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Learn with Friction Playground
Friction Playground compares how far moving objects travel across ice, wood, and a rug when they begin at the same speed. Choose a surface and observe its stopping result alongside the other tracks. Students can connect stronger friction with a shorter stopping time and distance while keeping the starting conditions consistent. This elementary forces activity supports fair testing, predictions, and discussion about why objects slow down differently on different surfaces in a simplified constant-friction model.
What to look for
Try a rougher surface
A larger friction effect removes the object's motion more quickly in this model.
Compare stopping places
The same starting motion can end at different distances on different surfaces.
For teachers and curious learners
Explore how friction changes stopping time and distance. Ask students to predict what will happen, change one setting, and explain what they observe. Learn gives a starting point. Practice and Challenge offer new goals with the same scene.
The model uses constant sliding friction on a level track and ignores air drag. Surface choices are simplified examples, not measurements for every real material.
Continue with Friction & Inclined Plane Lab .