Wheel+and+Axle

[|Wheel and Axle]:     A wheel and axle has a larger wheel (or wheels) connected by a smaller cylinder (axle) and is fastened to the wheel so that they turn together. When the axle is turned, the wheel moves a greater distance than the axle, but less force is needed to move it. The axle moves a shorter distance, but it takes greater force to move it. > Examples: Door Knob, Wagon, Toy Car

[|wheel] - a circular device that is capable of rotating on its axis, facilitating movement or transportation whilst supporting a load (mass), or performing labor in machines. A wheel, together with an axle overcomes friction by facilitating motion by rolling. In order for wheels to rotate, a moment needs to be applied to the wheel about its axis, either by way of gravity, or by application of another external force. Common examples are found in transport applications. More generally the term is also used for other circular objects that rotate or turn, such as a Ship's wheel, steering wheel and flywheel.

[|A wheel] is a circular object that, together with an axle, rolls easily. They were first widely used for transport. Wheel can mean lots of other circular objects that turn, like a steering wheel and flywheel. [|more...]


 * What's the problem?**
 * **Ask** -
 * **Imagine** -
 * **Design, Build** -
 * **Improve** -


 * That's engineering**
 * [|turning effect] - This is the effect of a force in turning a lever or a wheel. For example, think about the 'turning effect' of a person on a seesaw. The 'turning effect' will depend on the person's weight (the heavier the person, the more the turning effect), and where they are sitting (the further from the balance point in the middle, the more turning effect).

>.
 * Engineering ideas**

Here are some challenges for you to work on...
 * Do it**


 * News, updates**


 * Learn more...**
 * [|Wheel] - [|WikiJunior How Things Work]

..r0 .. e3 E is for Engineering and Everything