Question

if you were in a weightless environment, would it require a force to put an object in motion

Answer 1

Well you are talking about Newton's First Law, the law of Inertia...in a completely weightless environment, an object in motion will be in motion and those that are stationery will remain so. considering your object to be initially stationary, yes it would require a force \[F\] where\[F =ma\] where\[m\] is mass and\[a\] is the acceleration required.

Answer 2

tautalogy:

it will require force F basically to change its kinetic state by principle of accelerating mass. But motion generated by that force will develop under different rules. That's what it is: losing speed is like losing mass but in different time interval.