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1 .Pulley
A screw is a object when turned to the left will move into an object to hold it together. When you move it to the right it will move out of the object. Example: Electric fan blade and corkscrew
2. Screw
3. Wedge
The wedge is a triangular shaped inclined plane. It can be used to seperate two objects. Some examples of wedges are cutting a tree with an axe and chopping vegetables with a knife. Another example of a wedge is a when you put a wooden wedge to hold a door.
4. Inclined Plane
6. Wheel and Axle
5. Lever
A can opener is a complex machine with three simple machines. The turning knob makes a wheel and axle. The hinged handle foms a lever and cutting edge is a wedge. Another intresting fact I learned was that simple machines make work easier for us by allowing us to push or pull an object.
Intresting Facts
A pulley is a wheel with a rope on the top of it. It can be used to make heavy object easier to lift. A pulley can change the direction or size of the effort force. There are two types of pullies. One type of pulley is a fixed pulley. It makes the ressistance force and the effort force equal. Another type of pulley is a moveable pulley. This increases the size of the force. Example: flag poles, sail boats, and cranes
The wheel and axle is a object used for lifting heavy loads. A simple wheel and axle is a cylinder and a large wheel. Some uses of the wheel and axle are in many house hold objects such as the hand cranked pencil sharpener and the doorknob. Examples: Steering wheel of a car, door nob, screwdriver, egg beater
A lever is made out of a bar and a rod. A lever can help lift a heavy object using less force. Their are three types of levers, a first class, second class, and a third class lever. In a first class lever the fulcrum is placed in between the load and the effort. A second class lever has the load in between the fulcrum and the effort. A third class lever has the effort in between the fulcrum and the load. Eg; Class 1- seesaw, Class 2-diving board or spring board Class 3-Fishing rod
The Inclined Plane is a ramp used to raise heavy objects or loads using less force. Some uses of the inclined plane are when movers are pushing a heavy object such as a couch. These heavy lobjects can move easier by using an inclined plane. Other examples: water slides, roller coasters, air craft wings, slides, ramps in loading docks
The Six Simple Machines By:Hasala Rannulu
