`  ===Each in turn===  #Suggested: In physics, force is the perceptible cause of the acceleration of a mass (change in the rate or direction of its motion) and is experienced as a push or a pull. instead of In physics, force is what causes a mass to accelerate experienced as a push or a pull. #:The addition of ``and`` is good. However, a force need not be ``perceived`` to exist. The definition of ``acceleration`` is indeed confusing to the lay person, but I think that the wikilink on acceleration covers it. We need to be careful to not go overboard in description in the lead. #Provide definition: ``momentum (quantity of motion)`` #:Hmm, this isn't exactly an accurate definition of momentum since momentum is, in fact, both mass and motion. Again, the wikilink I think should suffice, but maybe we can reword things without providing definitions to make it clearer. I want this to be intelligible, but I'm afraid that including these points might be confusing for many and an annoyance to even more. #Following the development of quantum mechanics, it is now understood that momentum is a fundamental property of particles and that, according to the standard model of particle physics, changes in momentum are the consequence of the net emission or absorption by particles of momentum-carrying gauge bosons. Effects which are at the macro level experienced as a ``force`` are the consequence of the aggregate effect of these boson-mediated fundamental interactions. In modern physics, only four fundamental interactions are known; in order of decreasing strength, they are: strong, electromagnetic, weak, and gravitational.[1] High-energy particle physics observations in 1970s and 1980s confirmed that the weak and electromagnetic forces are expressions of a unified electroweak interaction. No gauge boson has yet been demonstrated for mediating the gravitational interaction and what is perceived as the ``force`` of gravity is more accurately attributable to the the effect of distortions by massive bodies of the curvature of spacetime as explicated in Einstein's Theory of General Relativity. #:There is a slight issue here with the sentence: ``Effects which are at the macro level experienced as a ``force`` are the consequence of the aggregate effect of these boson-mediated fundamental interactions.`` This sentence misses the fact that forces also exist on the micro level. A single boson-mediated fundamental interaction often has a ``force`` associated with it. For example, an electron accelerates because it emits a photon: this is due to the electromagnetic force acting on the electron. One micro-interaction: still a force since a mass accelerated.  I will implement the wording I think is good, but let's keep discussing the problematic wording.    `