The very first yo-yo appeared in ancient Greece and served as entertainment not only for children. Experienced craftsmen are capable of this simple device consisting of two disks with a jumper to which is attached a rope, to do such figures, but it is amazing. And all this almost without effort, because the principle of operation of the yo-yo is simple.
How it works
A yo-yo is the law of universal gravitation. Thanks to him, at the expense of the masses of the two disks when you run the yo-yo swoops down, but long ropes won’t let her touch the ground and she once again rushes up. If nothing is done after some […]