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  2. Physics | Definition, Types, Topics, Importance, & Facts |...

    www.britannica.com/science/physics-science

    Physics, science that deals with the structure of matter and the interactions between the fundamental constituents of the observable universe. Its scope of study encompasses not only the behavior of objects under the action of forces but also gravitational, electromagnetic, and nuclear force fields.

  3. Physics Portal | Britannica

    www.britannica.com/browse/Physics

    Physics, the basic physical science, studies objects ranging from the very small (using quantum mechanics) to the entire universe (using general relativity). It deals with the structure of matter and how the fundamental constituents of the universe interact.

  4. Newton’s laws of motion | Definition, Examples, & History |...

    www.britannica.com/science/Newtons-laws-of-motion

    Newton’s laws of motion are important because they are the foundation of classical mechanics, one of the main branches of physics. Mechanics is the study of how objects move or do not move when forces act upon them.

  5. Physics Definition & Meaning | Britannica Dictionary

    www.britannica.com/dictionary/physic

    PHYSICS meaning: a science that deals with matter and energy and the way they act on each other in heat, light, electricity, and sound

  6. Work | Definition, Formula, & Units | Britannica

    www.britannica.com/science/work-physics

    Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. The units in which work is expressed are the same as those for energy.

  7. Gravity | Definition, Physics, & Facts | Britannica

    www.britannica.com/science/gravity-physics

    College of DuPage Digital Press - Conceptual Physics - Gravity Academia - A Unified Theory of Interaction: Gravitation, Electrodynamics and the Strong Force Khan Academy - Introduction to gravity

  8. Physical science | Definition, History, & Topics | Britannica

    www.britannica.com/science/physical-science

    Physical science, the systematic study of the inorganic world, as distinct from the study of the organic world, which is the province of biological science. This article discusses the historical development—with due attention to the scope, principal concerns, and methods—of astronomy, chemistry, and physics.

  9. Vector | Definition, Physics, & Facts | Britannica

    www.britannica.com/science/vector-physics

    vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity’s magnitude.

  10. Force | Definition & Formula | Britannica

    www.britannica.com/science/force-physics

    Science Physics Matter & Energy Two forces applied simultaneously to the same point have the same effect as a single equivalent force. The resultant force can be found by constructing a parallelogram with the initial force vectors forming two adjacent sides.

  11. Reflection | Definition, Types, Examples, & Facts | Britannica

    www.britannica.com/science/reflection-physics

    The Physics Classroom - Reflection and the Ray Model of Light The University of Utah - Department of Mathematics - Quaternions and Reflections International Journal in Physical and Applied Sciences - Dynamics of Reflection of Light on Convex Surface With Special Reference to Optical Speccifications