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Physics & forces

Gravity, motion, friction, floating, levers, magnets.

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Physics & forces Storybook Do heavy things fall faster? gravitymotion Open the story Physics & forces Storybook Why are heavy things hard to push? motionforce Open the story Physics & forces Storybook How does a glass screen know exactly where your finger is? electricitysenses Open the story Physics & forces Storybook Is it harder to START a box sliding or to KEEP it sliding? frictionforce Open the story Physics & forces Storybook What Makes Things Slippery? frictionmotion Open the story Physics & forces Storybook Why can a tiny kid lift a giant grown-up on a seesaw? leversbalance Open the story Physics & forces Storybook Why do tightrope walkers carry a long pole? balancemotion Open the story Physics & forces Storybook Does the shape of a piece of steel decide if it floats? floatingdensity Open the story Physics & forces Storybook Why does a balloon get squished when you dive deep in a pool? pressurefloating Open the story Physics & forces Storybook Why Do Magnets Pull and Push? magnetsforce Open the story Physics & forces Storybook Why does a ball on a string fly off the second you let go? motionforce Open the story Physics & forces Storybook Why does a moving bike stay up? balancemotion Open the story Physics & forces Experiment Which way will these hanging cans move? pressureair Try it out Physics & forces Experiment Why does hot air rise? floatingpressure Try it out Physics & forces Storybook Why does a bulb only light up when the wire makes a full loop? electricitycircuits Open the story Physics & forces Experiment Why do holiday lights all go dark when one bulb dies, but house lights don't? electricitycircuits Try it out Physics & forces Storybook Why does rubbing a balloon on your hair make it stick to the wall? electricityforce Open the story Physics & forces Storybook Why does a moving magnet make power? magnetselectricity Open the story Physics & forces Experiment Why does a parachute let you fall slowly when a rock just drops? airgravity Try it out Physics & forces Experiment Why is it easier to lift a heavy bucket from a well with a wheel on top? machinesforce Try it out Physics & forces Experiment Two sheets of the same paper, same weight — do they fall at the same speed? airgravity Try it out Physics & forces Storybook Which cart presses the mud harder? pressureforce Open the story Physics & forces Experiment Why does a roller coaster need a big first hill to make it all the way around? motiongravity Try it out Physics & forces Experiment Why do heavy ships float? densityfloating Try it out Physics & forces Experiment Where does boiling water go? states of matterevaporation Try it out Physics & forces Experiment Why do some things stretch back? materialselasticity Try it out Physics & forces Experiment What will shaking do to two grain mixtures? mixingmaterials Try it out Physics & forces Experiment Why does wet sand stick? materialswater Try it out Physics & forces Experiment Why doesn't the Moon just fall down onto us? spaceorbits Try it out Physics & forces Experiment Why do astronauts float if there's still gravity up there? spacegravity Try it out Physics & forces Experiment Why does cold water feel colder than cold air at the same temperature? skinsenses Try it out Physics & forces Experiment What does spinning do to a top that's about to fall over? balancemotion Try it out Physics & forces Experiment Why doesn't the water spill when you swing a bucket over your head? motionforce Try it out Physics & forces Storybook What Happens When a Spinning Skater Pulls Her Arms In? spinmotion Open the story Physics & forces Storybook How does a thermometer know how hot it is? heatparticles Open the story Physics & forces Storybook Where does a helium balloon go? airpressure Open the story Physics & forces Storybook How does the AC make cold air? heathome Open the story