Answer:
Some try to hide some try to cheat. But time will show we always will meet. Try as you might to guess my name. I promise you'll know when you I do claim.
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
When I get closer my tail grows longer but when I go away my tail leads the way.
I am an instrument capable of making numerous sounds but cannot be touched or seen. What am I?
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.