Advantages of traditional inner rubber band

The improvement of initial velocity and penetration is very strong.

Underwear is a form of cocktail.

The principle is that the center of gravity of the rubber band moves to the side near the slingshot, because the front is thick and the back is thin.

After the rubber band is fully stretched, the moving distance of the center of gravity decreases, and the time for the center of gravity to rebound to its original position in the same time is reduced on the premise that the resilience of the rubber band remains unchanged.

The time for the leather bag to return to its original position is also reduced accordingly.

According to speed = distance/time

The speed has increased.

Note: the calculation of the speed of a long object is based on the center of gravity, and the rubber band is also a long object.