Answer:
What goes further the slower it goes?
I am so simple that I can only point. Yet I guide men all over the world.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
Sometimes black, sometimes white, I have veins but no blood
A word of five letters, Upside down is the same, A shark does this, But itβs not to blame. What is the word?