A dung cu is a device which has stationary or moving parts or both combined together utilizes, generates or transforms mechanical energy. Any kind of dung cu makes work easier. A simple dung cu reduces the effort by simply changing the magnitude or direction of the force. There are two main types of simple machines one is the application of vector resolution of force and the other equilibrium of torques.
Lever, wheel and axle, pulley, inclined plane and wedge and screw are the common types of simple dung cu. Lever comprises of just a bar supported at a point called fulcrum. The fulcrum is in the middle in first class levers while it is on the ends in second class levers. Seesaw is an example of first class lever. Fishing rod and can opener come under second class levers.
Wheel and axle consists of two circular objects one larger than the other. The larger one is called the wheel and the smaller one axle. When a force is applied on the wheel, it transfers itself to axle and gets multiplied. Effort or force can be applied either on the outer wheel that is wheel or on the inner wheel which is axle. Common examples of wheel and axle are pencil sharpener, gears, door knobs etc.
Pulley is a simple dung cu, Maymoc comprising of a wheel and a rope which is used to lift objects. Although the force required is same, pulley makes the process of lifting objects easier. If the machine comprises of two pulleys the force required will be much less. You can lift very heavy objects in this process. Cranes and elevators utilize basic pulley in their working principle.
Inclined plane as the name suggests is a slanted surface or ramp over which heavy objects can be easily rolled up to a height. As the surface is slanted much less effort is required to drag or push a heavy object.
During writing articles writers often stay blank in front of machines. Sometimes ideas don’t come frequently. The most effective solution to this problem is to repurpose the maymoc. Readers although have read all your articles but they can’t remember all of them. Thus you can pass on your old content in a new pack and they will mistake it to be unique.
If you are blogging for several years then the best way is to combine different blogs and submit it to an article publisher or directory. Even if your blogs are short you can combine and compile them to form an article of 400-500 words.
You can also review reports and e-books to repurpose it into new articles. You can just change the style of writing easily with experiences in this field. But don’t do the mistake of copying the whole item of the e-book if you have mentioned it in the resource box.
Clients often leave comments and questions regarding your article in your website or blog. You can write an article based on the points customers made. They will be pleasantly surprised and pleased and may pass it to others.
Author Resource:
Sieu Thi Thiet Bi va Dung Cu Cam Tay is the author of this article on thiet bi .
Find more information about cong nghiep here.
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