Answer:
Forward Iām heavy, but backwards Iām not.
Look into my face and I'm everybody. Scratch my back and I'm nobody.
My first is in blood and also in battle. My second is in acorn, oak, and apple. My third and fourth are both the same. In the center of sorrow and twice in refrain. My fifth starts eternity ending here. My last is the first of last, Oh Dear.
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
You will find me with four legs, but no hair. People ride me for hours, but I don't go anywhere without needing to be tugged. Jerked or turned on, I always manage to be ready for work.
What flies without wings?