Home > Shock Absorber > Effective Weight     The effective weight is absorbed real impacting quanitity of energy during the period between colliding a moving object to shock absorber and stop of a moving object. The left drawing (A) shows that even if real weight is too small, in case of impacting velocity is suffic- iently high (more than 3m/sec), the effective section of orifice needs to be increased because of generating high resisting force at the beginning of motion object collide. The left drawing (B) shows that even if the colliing velocity is too low (less than 0.5m/sec), effective section of orifice needs to be decreased when the weight is sufficiently weighted or additional driving force occurs as high resist force generates at the end of stroke.     As known to see figure ①,②,③,④ even though the motion object has same weight and velocity, the impact real energy on shock absorbers has big difference in accordance with propelling force and existence shock absorber or not. At first compare ① to ②, in case of ② which received propelling force is three times bigger than in case of ①. And in case of ③④, even though these have same Kinetic energy, real impact energy of ④ increased sixteen times more than in case of ③, according to location of shock absorber. As above even though same weight and velocity, it must be considered not only total energy but also effective weight when the model is selected, because real impact energy received from shock absorber is quite different according to cases.