Hypothesis, Axiom and Models
Hypothesis is a supposition without assuming that it is true. It may not be proved but can be verified through a series of experiments.
Axiom is a self-evident truth that it is accepted without controversy or question.
Model is a theory proposed to explain observed phenomena.
Assumption is the basis of physics, where a number of phenomena can be explained. These assumptions are made from experiments, observation and a lot of statistical data.
Fundamental Forces in nature
The forces which we see in our day to day life like muscular, friction, forces due to compression and elongation of springs and strings, fluid and gas pressure, electric, magnetic, interatomic and intermolecular forces are derived forces as their originations are due to a few fundamental forces in nature.