The document discusses the wheel and axle simple machine. It consists of a rod attached to a wheel so that their movements are coupled. When the axle turns, the outside of the wheel turns at a greater linear speed due to their equal rotational speeds. The wheel and axle provides mechanical advantage and is used to either multiply force or distance in systems like doorknobs, bicycles, and cars. Its mechanical advantage is calculated as the ratio of the wheel's radius to the axle's radius.

1. The Wheel and Axle By: Group 6

2. What’s a wheel and axle? • A wheel and axle is a simple machine that is in the category of a second or third-class lever. It provides Mechanical Advantage (MA). The mechanical advantage is the ratio of the resistance to the effort.

3. It consists of a rod attached to a wheel so that their movements are coupled when one of the parts is turned. When the axle is turned, the outside of the wheel turns at a greater linear speed because the rotational speed is the same.

4. The wheel and axle is used either as a force multiplier (such as a doorknob, steering wheel or fishing reel) or as a distance multiplier (such as on a bicycle or the driven wheels of a car).

5. Mechanical Advantage calculate mechanical advantage of a wheel & axle by considering the radius of the wheel over the axle Mechanical radius of the wheel advantage = radius of the axle

6. As with any system using MA, you give something to gain something. Here you are increasing the distance that you must turn to achieve one rotation of the axle, but you are increasing torque at the axle by the same ratio, thus making it “easier” to raise the bucket.

7. History It is not certain who created wheel and axle, it is known that it was used in ancient times. The oldest wheel publicized by archaeologists was found in 2002 in Ljubljana. The wheel was made of ash and oak and had a radius of 70 cm. The axle is 120 cm long and made of oak.

8. examples of a wheel and axle system Sprocket and shaft Doorknob

9. Fishing reel Carousel

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