The force must cause the object to move.
You must have an energy which moves an object. If the object does not move - No work is done.
in the same direction as the object's motion.
Force is measured in Newtons (N) The amount of force required = the mass of the object x the acceleration
i believe, and i may be wrong, bet the force required to move the object in the water will be less than the force required to move the object through the air. the best bet for you to see this is to try it for yourself.
Work is done when force causes an object to move and capacity of doing work is called energy So, energy is required and consumed when force causes an object to move
No force is required to keep an object in motion. Maintaining speed and direction seems to be "the natural thing to do" for any object. A force is required to CHANGE an object's velocity, whether you want to make it go faster, slow it down, or simply change the direction for a moving object.
Newton 2nd Law is the answer
Any amount will do.
To move an object that is at rest, you must overcome all other forces that are acting on the object, such as friction.
simple machine
There is no fundamental relationship between the distance an object moves and the force applied to it. Once an object is moving, no force is required to keep it moving, and the distance it can move without applied force is unlimited.