A Comparative Analytical Study between Some of the Mechanical Laws to Extract the Explosive Power of the Legs to the Students of the Faculty of Physical Education

The resultant measure of various tests are main theme which the researcher is going to shed light on, that also includes the explosive power measurement of the legs especially the selective test of (Sargent), that depends on the distance that jumps out laboratory vertically, and that was accredited test for a decade. that's why all sporty activities need an explosive power of the legs and their measurements are a necessary for the sporty training, the purpose of the above mentioned test is to valuate the level of the explosive power of the legs muscle during bouncing (jumping) in vertical shape, the vertical jump is defined as the highest point that the athlete can touch from a standing jump, less the height that the athlete can touch from a standing position and thus a jump is a rose by centimetre that's indirect measurement for the explosive power of the legs muscle in the sport researches or previous equation sport. Therefore, by reaching a persuasive scientific result we do achieve service for the company which designate sporty equipment's for the sake of getting an accurate law to measure the explosive power of the legs. Through this research the researcher is trying to study and shed light on all biomechanical existing laws which was used by other researchers in the previous and compare with some of them that means by the comparison of these laws the problem would be summed up so as to get any law that serve this mechanical test, and which one of them is more accurate than any others scientifically, therefore through our knowledge about mechanical law we serve more accurate to the scientific side.