The Mechanical Analysis Of Chain Of Powers Formed By Hitting The Ball On Continuous Move In Table Tennis

Table tennis is a kind of ball game,in which human takes the initiative to give force,then hit the ball,resulting in the ball moving in a reversed direction.And both sides are combined with the ball,moving at high frequency and fast speed and with a dynamical balance across the net.The core is frequently shifted impetus that accelerates and changes frequently in the successive move.Namely,it is a chain of systematic move formed by human's move and the racket's move to move of the ball.Therefore,in this paper,after analyzing and studying a lot of documents,relevant papers and theoretical works,combing the basic principles of physics,mechanics with table tennis playing,we can get certain mechanical laws in continuous move that we observe in giving force and using kinds of skills and tactics.1) In a game,by using the court and rules and hitting the ball,human is demonstrating a series of move,during which human gives the force initiatively transmitting the energy,then converts it,and finishes the connection of the force, thus form a chain of power in continuous moves,the shift of impetus is completed efficiently.2) During connecting impetus,under the gravity and friction on the ground, the forepart of the sole gives force by treading,then we can adjust our body and steps in order to keep a better control of the ball.After mechanical analysis,associated with practice,this move is a kind of parabola.In line with the features of the footwork in playing,combined with the mechanical features of parabola,this move can be divided into bounce,translation and lower move.Each has different results of hitting.3) The reconnecting of power after move includes a circular of drawing the racket,wielding the racket and reverting.Especially in successively hitting the ball, the locus of this circle,the cycle,the frequency and the preparation before hitting have a direct effect on hitting the ball.In the research we compare the locus,the cycle, and frequency between this circular and simple pendulum and conical pendulum by using mechanical methods,then we know then we hit the ball successively,by using the feature of ellipse-improving the speed and frequency,we can gain the advantage in skills and tactics.4) Moving the body is not only to improve the use of skills and tactics. Human has to use the skills,tactics,strengths and speed.By using the gravity and friction on the ground,human body gives force to accelerate or slow down,then transmitting part of energy into the ball in the form of kinetics.At the hitting moment, three laws of Conservation of Momentum among human body,the racket and the ball. Then after analyzing,comparing and calculating,we can see the different influences on the speed of ball because of fixed gravity and moving-ahead gravity.During hitting the ball,compared with the situation with the fixed gravity,using a moving gravity, the returning speed is more than 20,000 times.