Physics Crossword Puzzle

the state in which one objects distance from another is changing
the distance an object travels per unit of time
the earth ____ on its axis
the earth _____ around the sun
a speed in any direction
Newton's first law
push or pull
the force between rubbing objects
every action there is an equal and opposite reaction
the moving of something from its place or position
force that's acts on a body moving in a circular path
a rate at which something is able to move or operate
capacity to gain speed in a certain amount of time
downward movement under the force of gravity
the strength and vitality requied for sustained physical or mental activity