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Bounce the ball will bounce up because the ball at the start of contact with the ground, the acceleration of upward force to a big proportion of acceleration, even in brief contact with the ground time also can achieve a movement direction of high speed up, and horizontal stress, so no play up "close speed" is the vertical upwards speed (is not the square of the acceleration) speed and direction of the speed of the original level of the square and open again, and the square if a numerical decomposition, the final and speed is inclined upward direction, bouncy ball still to the ground from the air again because of the falling thrown up by air convection in the process of the influence of gravity, the more close to the ground, the greater the area from the ground the closer is the more into a straight line, the bouncing ball is in the horizontal "decomposition" movement is inversely proportional to the vertical direction, "decomposition is acceleration is 9.8" movement of the acceleration in the linear motion. So close sports or a downward parabola.

Yao's bouncy ball factory is a set of production and the sale in a body's toys enterprises, the bouncing ball main wholesale business, the products are wide to sell American and European regions, welcome general new old customers to come to consult the business negotiations.