Do all forces make objects move and why?

Answer 1

All physical forces make objects move. Right now there are 4 accepted, tested, and explained forces in the model described by our modern physics.

The gravitational force - the weakest force is explained by F=G m1m2/r2. Here F = force, G is a gravitational constant established to several orders of magnitude by precise experiments (the record is held by a large scale Cavendish experiment), m1 and m2 are the masses you are measuring forces between, and r is the distance between the center of the two masses.

The reason this force causes objects to move is unknown; it just does. There are several theories which explain large scale gravity; Einstein's space-time is the most well accepted. This theory of general relativity simply says that the more massive an object is, the more it will bend space-time. There is a lot of complicated mathematics, which isn't actually so complicated as long as you understand the basics, which explains why this is so. Gravity is possibly the best experienced and least understood of the 4 forces.

The second of the 4 forces is the electro-magnetic force. This force has been experienced by humanity since we first grew out of the earth; our bodies are after all held together by electro-magnetic forces. Friction is an electro-magnetic force. Chemical reactions are actually manipulations of the electro-magnetic force. This force was most completely described, quantitatively and theoretically-wise, by James Clerk Maxwell. He predicted 4 field equations which characterized all of electricity and magnetism's behavior and reliance on each other. These 4 equations along with The Lorentz force law characterize this force, the sciences of E&M, optics, and solid state/thermal physics and define the profession of electrical engineering, computer engineering, and even the science of chemistry.

The electric force equation is F=k*q1q2/r2 where k is a constant, q1 and q2 are the two charges, and r is the separation between them. The general lorentz force equation is F = q(E + vXB). q is charge, E is electric field, v is velocity of charge, and B is the magnetic field. E&M is probably the best understood and explained of the 4 forces. We know charges repel or attract each other, depending on their positive or negative character. Beyond that, its most likely up to yours or (most likely) some future generation to explain why a certain charge is negative or positive.

When you start talking about the last two forces you have to already have a good grasp on electricity and magnetism.

The weak force is a force that is a lot weaker than the E&M force but a lot stronger than gravity. It affects strange particles in strange ways; and by strange I am not referring to quarks exclusively. Say you have a particle that is massless but charged. This particle can, via the weak force, convert into another type of particle called a neutrino. Also the weak force can convert types of quarks, which are fundamental particles just like electrons, to other types of quarks which changes various measurements of the particle, like spin, flavor, charge, and parity.

So to answer your question, the weak force doesn't necessarily 'move' a particle but it can change how it behaves, i.e. change it into a new particle.

The strong force is the last of the 4 major forces. It holds particles that are of the same charge together; it is the strongest of the 4 forces. Say you have an atom. There might be a bunch of protons and a bunch of electrons circling those protons. How are there a bunch of protons in the center? The strong force overcomes this electromagnetic force and brings these positively charged protons together. It overcomes the repulsion of the charge; the strong force relies on other quantities of the protons, namely color.

So there are some buzzwords, look them up, buy some books, go to college, be a physics major.

Take care :)

Answer 2

The answer to this question depends on the view of prima genitor (first agent). It is true that an object in motion will remain in motion and an object at rest will remain at rest unless either is acted upon by an outside force.

This is known to be true from astrophysics (study of the night sky) and astronauts. When we launch space probes, we only supply enough thrust to escape Earth's gravity well and then they are carried by momentum to the outer edges of the solar system.

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Answer #2:

No, it's not true. Matter accelerates only when a force causes it to accelerate,

but matter in motion with no force acting on it continues in uniform motion.

Answer 3

No force is required for an object to move with constant velocity, but you need a force to accelerate an object (make velocity increase or decrease).