Explains the science of how springs work, discussing real-life examples such as pogo sticks, locks, spring balances, and pinballs, and includes activities that illustrate the principles covered.
Explains the science of how pulleys and gears work, discussing real-life examples such as cranes, drive belts, drills, and mountain bikes, and includes activities that illustrate the principles covered.
Bill Nye the Science Guy answers questions about simple machines, and conducts experiments that demonstrate how gears make work easier and increase speed and energy, and show how to make a simple pulley.
Introduces the concepts of forces, work, and how machines are used to make work easier, with descriptions of six simple machines, including the lever, wheel and axle, pulley, inclined plane, screw, and wedge.
Introduces the workings of various kinds of simple machinery with moving parts, such as pulleys, levers, gears, cams, and conveyor belts and provides instructions for building these machines out of cardboard and other easily obtainable materials.
Describes simple machines such as an inclined plane, wedge, screw, lever, pulley, and wheel and carefully explains the purpose of each machine and how to use it.
Explains in basic terms the physical principles behind the use and operation of wheels and gears, with diagrams that provide several examples involving doorknobs, steering wheels, and pulleys.
