Playback serverIf a title won’t play, switch servers.

3-2-1 Contact

Season 1 · Episode 10

Forces: A Spectacle of Forces

0.030mMarch 28, 1980

REHASHED FROM THE PREVIOUS FOUR EPISODES: Roller coaster design; stuntman; orbiting satellites. Also: what forces propel a bicycle.

Previous Episode Next Episode

Episodes

Episode 1Noisy/Quiet: Production & Processing of Sound
Episode 2Noisy/Quiet: The Ear
Episode 3Noisy/Quiet: How People & Animals Use Sound
Episode 4Noisy/Quiet: Music
Episode 5Noisy/Quiet: Range of Vibration
Episode 6Forces and Motion
Episode 7Forces and Fields
Episode 8Forces: Buoyancy and Gravity
Episode 9Forces and Machines
Episode 10Forces: A Spectacle of Forces
Episode 11Growth/Decay: Sex and Seeds
Episode 12Growth/Decay: Human Growth
Episode 13Growth/Decay: Decay
Episode 14Growth/Decay: Human Cultures/Land Forms
Episode 15Growth/Decay: Cycles Upon Cycles
Episode 16Fast/Slow: Speed Up, Slow Down
Episode 17Fast/Slow: Rhythms of Nature
Episode 18Fast/Slow: Lifetimes
Episode 19Fast/Slow: Speed and Racing
Episode 20Fast/Slow: Time and Time Again
Episode 21Communication: Human Communication
Episode 22Communication: Animal Communication
Episode 23Communication: Machinery of Communication
Episode 24Communication with Other Species
Episode 25Communication: Feedback
Episode 26Food/Fuel: Animal Food
Episode 27Food/Fuel: Human Food
Episode 28Food/Fuel: Growing and Processing Food
Episode 29Food/Fuel: Fueling Machines
Episode 30Food/Fuel: The Sun Makes Everything Go
Episode 31Hot/Cold: People's Temperatures
Episode 32Hot/Cold: Animal and Plant Adaptations
Episode 33Hot/Cold: How Hot or Cold Can It Get?
Episode 34Hot/Cold: Heat and Work
Episode 35Hot/Cold: Temperatures on Earth/In Space
Episode 36Light/Dark: The Sun
Episode 38Light/Dark: Electromagnetic Spectrum
Episode 39Light/Dark: The Eye
Episode 40Light/Dark: Light Sources
Episode 41Near/Far: Seeing Isn't Always Believing
Episode 42Near/Far: Mapping and Navigating Near Home
Episode 43Near/Far: Mapping and Navigating Over Earth
Episode 44Near/Far: Space Travel
Episode 45Near/Far: Knowing Where You Are
Episode 46Order/Disorder: Regular Patterns
Episode 47Order/Disorder: The Body â€“ An Ordered System
Episode 48Order/Disorder: Social Order
Episode 49Order/Disorder: Disordered
Episode 50Order/Disorder: Sum of Its Parts
Episode 51Surfaces: Protection
Episode 52Surfaces: Shapes and Functions at the Surface
Episode 53Surfaces: Surface Tension and Bubbles
Episode 54Surfaces: Surface of the Earth
Episode 55Surfaces: The Atmosphere
Episode 56Big/Small: Animal Sizes/Scaling
Episode 57Big/Small: Animal Habitats
Episode 58Big/Small: Dinoaurs
Episode 59Big/Small: Volume & Efficiency
Episode 60Big/Small: How Big is Big?
Episode 61Crowded/Uncrowded: Human Crowding
Episode 62Crowded/Uncrowded: Optimum Populations in Nature
Episode 63Crowded/Uncrowded: Contrasts in Densities of Materials
Episode 64Crowded/Uncrowded: Down Among the Atoms (Liquids & Solids)
Episode 65Crowded/Uncrowded: Human Survival/Controlling Densities