Answer:
I go around in circles, but always straight ahead, never complain, no matter where I am led.
I have a straight back and sharp teeth to cut objects.
To cross the water, I'm the way. For water I'm above, I touch it not and truth to say, I neither swim nor move. What am I?
I am an instrument capable of making numerous sounds but cannot be touched or seen. What am I?
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
Why was the cook arrested?