Forces & Motion Games — Predict, Watch, Understand
These free forces and motion games let a child predict what will move, watch it happen, and see why. Motion is full of ideas that feel backwards — a rider flies forward when the bus stops, a heavy pendulum keeps the same time as a light one, and invisible air can crush a can — so guessing first, then watching, is how it makes sense. No ads, no sign-up.
Predict which way it moves in a tug-of-war — equal forces balance and nothing moves; the stronger side wins.
Predict what a rider does when the bus stops — a moving body keeps moving. That is why we wear seatbelts.
Predict what changes a swing’s speed — only the length does; a heavier bob or a wider swing keeps the same timing.
Predict what air pressure does — it pushes from every side, holding water in an upside-down glass and crushing cans.
Predict which lands first — a heavy object or a light one — then watch them fall together.
In air the feather flutters; pump the air out and it falls as fast as the penny. See what really slows it.
Predict which surface a block slides farthest on — ice, wood or carpet. More friction, shorter slide.
Predict how many balls swing out when you release a few — momentum passes straight through.
What kids learn
A force is a push or a pull. Things keep doing what they are doing until a force changes them (inertia); equal opposite forces balance and nothing moves; a pendulum’s timing depends only on its length; and even air pushes hard enough to hold up water or crush a can. Add gravity, friction and momentum and you have the everyday physics of motion. Each game isolates one idea.
More science games
Explore the full set on the science games hub, including gravity games and simple machines games.
Common questions
What is inertia?
Inertia is the tendency of things to keep doing what they are already doing. A moving object keeps moving and a still object stays still until a force changes it. That is why a standing bus rider lurches forward when the bus brakes — the rider keeps moving even though the bus stopped — and it is exactly why seatbelts matter.
What are balanced and unbalanced forces?
When two forces are equal and pushing in opposite directions, they balance out and nothing moves — like a tug-of-war between two equal teams. If one side pushes or pulls harder, the forces are unbalanced and the object moves toward the stronger force.
What makes a pendulum swing faster?
Only its length. A shorter pendulum swings faster and a longer one slower. Surprisingly, the weight of the bob and how wide you swing it do not change the timing at all — two pendulums of the same length stay in step even if one is much heavier. This is why pendulum clocks keep steady time.
How does air pressure work?
Air pushes on everything from all directions. We do not feel it because it pushes equally all around us. When there is less air pushing on one side — sucking a straw, or cooling the air inside a can — the air on the other side wins, pushing the drink up the straw or crushing the can.
What age are these forces games for?
Roughly ages 8–13 (grades 3–8), and each game shows its grade band. Balanced forces, gravity and friction suit grades 3–5; inertia, pendulums and air pressure reach grades 4–7; momentum (Newton’s Cradle) is middle school. The predict-and-watch format needs no reading-heavy setup.