Question

Is force required to keep a body moving?

Answer 1

If we are giving a force to a body in rest to start motion
it will continue its motion untill it is acted by an external force oposit to the direction of motion.
There are many natural forces that oposes the motion of a body
like frictional force and air resistance etc.
So To keep a body moving,we must give a continous force to overcome the natural oposing forces or the body will come to rest after moving some distance