What four forces are always acting on any object that is moving?

Question

Just need to know for my metal tech teacher.

Answer 1

As another person said, there are four fundamental forces. But, you can't say that these forces are acting on an object moving unless they are actually causing the object to move (except gravity, which acts on all objects at all times). This is a faulty question likely posed by a person with a poor understanding of physics.

Answer 2

You have to qualify this question, by giving the conditions under which it is moving. Of course, an object can be moving, as a rock through outer space, without any forces acting on it at all. If you are talking about an object in a gravitational field, moving under its own power through a fluid such as air or water, there are several forces always acting on it. For an object on land, there's
thrust (forward), drag or resistive (backward), weight (downward), and reactive (upward). If the object is on the water surface the reactive force is called the buoyancy force

For an object through the air, such as an airplane, there's thrust, drag, lift, and weight.

Answer 3

There are four fundamental forces in the Universe: gravity, electromagnetic, strong nuclear, and weak nuclear. But if an object is isolated then only gravity will be acting on it: can't escape gravity anywhere in the Universe. So there _aren't_ 4 forces acting on all objects, moving or not. It's a poorly-posed question.

Answer 4

A moving object needs NO force to keep it moving.

Answer 5

a body in space has no forces acting on it (assuming it is not accelerating)

if it's a rocket with propulsion it has ONE force acting on it