Q:Physics high school. Why does a spring fall to the lowest point and the acceleration a must be greater than the acceleration of gravity g ah. Seek expert

Is the map tilted?.Look at the picture. It means that a naturally stretched spring is placed vertically and then put a mass of m at zero initial speed.If dropped to the lowest point, the speed of the object v=0, object by the acceleration of gravity g down, if not spring to give it an g greater than or equal to the acceleration, the object will continue to fall, do not conform to the original intention of "low".So the acceleration inside the spring must be greater than or equal to g.

Q:What kind of material does spring have?

Carbon spring steel: the material: 65#, 70#, 65Mn, 82B, 72A, 72B steel, is characterized by low plasticity, strong elasticity, anti stress ability. Application: mainly used for Simmons bed, car cushion, and all kinds of machinery, electric tools, stationery, sports equipment, torsion spring, spring, electrical equipment and other industries. Specifications: line diameter 0.20mm- GB4357-89 6.50mm. standard: carbon spring steel wire, national standard, main use: used to make cold formed in the cold state without hardening spring

Q:What is an independent bagged spring?

The characteristics of independent bagged springs is independent bagged spring each spring can be independent of support, stretching alone, completely conform to the body curve, so that all parts of the body are the best care, with ergonomic, closely supporting effect. Spring tube respectively operation, a force, not elsewhere, even if the pillow was over, it will not affect the sleeping of another, especially by adding a layer of high elastic cotton blanket and wave type sponge bed, bump by using body wave sponge flip natural movement to achieve the massage and health care enjoy the ultimate role of sleep.

Q:How should we choose the spring material?

The selection of spring materials shall be determined according to the nature of the load, stress state, stress magnitude, working temperature, working environment and service period of the spring.

Q:In short, in vibration and wave, it is not easy to make mistakes when we grasp the difference and relationship between "displacement" and "displacement relative to the balance position"

In short, in vibration and wave, it is not easy to make mistakes when we grasp the difference and relationship between "displacement" and "displacement relative to the balance position"

Q:I buy a spring made of 1.2mm steel wire from a hardware store that needs quenching

In general, hot bending spring coil spiral spring and disc spring of hot stamping, preferably in hot forming and quenching by the heat immediately. In this way, the heating and the decarburization degree of the spring can be omitted, and the surface quality of the spring can be improved both economically and at the same time.

Q:Spring dynamometer and spring balance what is the difference

Spring dynamometer and spring balance what is the differenceThis is a question of grade seven (junior one).You didn't answer all right. I found it on the Internet now:The size of the measurement tool called spring dynamometer, dynamometer is a commonly used dynamometer (including spring scale), the experiment is in common is the spring balance.Also, the spring scale is used to measure the force, not to measure the quality.

Q:The glass door spring is generally guaranteed for several years

but once you change the maintenance fees are higher than the artificial spring spring price itself

Q:The shop glass spring door is too tight, how to adjust?

It is better to ask professionals to deal with the danger!

Q:Cold rolled coil spring spring and difference "

Difference: the main annealing time is different. In the production process, is the first volume of coil spring and annealing, and spring is the first cold roll annealing, and then roll. Similar to cold rolling and hot rolling of steel.Note: spring making methodProduction method of cold rolled coil spring: to stress annealing, end surface grinding, (blast), (the whole school), (BKS), standing or forcing treatment, surface inspection and treatment.Production method of coil spring: blanking, end processing (rolled or forged flat), heating, coiling, quenching, tempering, grinding end to compression to (load test), shot peening (cleaning), coating.