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  2. Wheel and axle - Wikipedia

    en.wikipedia.org/wiki/Wheel_and_axle

    The wheel and axle is a simple machine, consisting of a wheel attached to a smaller axle so that these two parts rotate together, in which a force is transferred from one to the other. The wheel and axle can be viewed as a version of the Lever , with a drive force applied tangentially to the perimeter of the wheel, and a load force applied to ...

  3. Mechanical advantage device - Wikipedia

    en.wikipedia.org/wiki/Mechanical_advantage_device

    Wheel and axle motion (e.g. screwdrivers, doorknobs): A wheel is essentially a lever with one arm the distance between the axle and the outer point of the wheel, and the other the radius of the axle. Typically this is a fairly large difference, leading to a proportionately large mechanical advantage.

  4. Wheel - Wikipedia

    en.wikipedia.org/wiki/Wheel

    The wheel alone is not a machine, but when attached to an axle in conjunction with bearing, it forms the wheel and axle, one of the simple machines. A driven wheel is an example of a wheel and axle. Wheels pre-date driven wheels by about 6000 years, themselves an evolution of using round logs as rollers to move a heavy load—a practice going ...

  5. Simple machine - Wikipedia

    en.wikipedia.org/wiki/Simple_machine

    A compound machine is a machine formed from a set of simple machines connected in series with the output force of one providing the input force to the next. For example, a bench vise consists of a lever (the vise's handle) in series with a screw, and a simple gear train consists of a number of gears ( wheels and axles ) connected in series.

  6. There Goes a... - Wikipedia

    en.wikipedia.org/wiki/There_Goes_a...

    Real Wheels, also known as There Goes A..., Live Action Video for Kids, and Dream Big, is a live-action series of children's educational videos for ages 3-8 that features a specified vehicle and the different jobs it has along with real people who work the job which requires the vehicle.

  7. Category:Simple machines - Wikipedia

    en.wikipedia.org/wiki/Category:Simple_machines

    Pages in category "Simple machines" ... Wheel and axle; Whippletree (mechanism) This page was last edited on 28 April 2019, at 21:27 (UTC). ...

  8. History of mechanical engineering - Wikipedia

    en.wikipedia.org/wiki/History_of_mechanical...

    The wheel, along with the wheel and axle mechanism, was invented in Mesopotamia (modern Iraq) during the 5th millennium BC. [3] The lever mechanism first appeared around 5,000 years ago in the Near East, where it was used in a simple balance scale, [4] and to move large objects in ancient Egyptian technology. [5]

  9. Actuator - Wikipedia

    en.wikipedia.org/wiki/Actuator

    Wheel and axle: Hoist, winch, rack and pinion, chain drive, belt drive, rigid chain and rigid belt actuators operate on the principle of the wheel and axle. By rotating a wheel/axle (e.g. drum, gear, pulley or shaft) a linear member (e.g. cable, rack, chain or belt) moves. By moving the linear member, the wheel/axle rotates. [18]

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