When akicked ball hiys the ground is it dead?

Answer 1

No.

There is no rule against fielders using any part of their bodies to field a ball, including a kick. If a fielder wanted to kick a slow roller to the first baseman in order to make a force-out, that would be perfectly permissible.

If a fielder accidentally knocks a ball out of play, the ball is dead and all runners advance two bases.

If a base-runner kicks a ball, he is out for interference, the ball is immediately dead (ie, no need to wait till it hits the ground), and all runners must return to their previous base.