Question

drag the missing word into place
first, an object at rest stays at rest, of course,
unless theres an outside
so the pushing, the pulling, determines the speed,
like sticks hitting pucks in a rough game of hockey.
position
velocity
force

Explanation:

Newton's first law of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. The words "pushing" and "pulling" in the text are descriptions of force.

Answer:

force