Key Physics Concepts
Physics is the study of matter, energy, and the interactions between them. It encompasses various branches, including mechanics, thermodynamics, electromagnetism, and modern physics. Here are some essential formulas and concepts:
Mechanics
- Newton's Laws of Motion:
- First Law: An object remains at rest or in uniform motion unless acted upon by a force.
- Second Law: F = ma (Force = mass x acceleration).
- Third Law: For every action, there is an equal and opposite reaction.
- Kinematic Equations:
- v = u + at (Final velocity = Initial velocity + acceleration x time).
- s = ut + 0.5at² (Displacement = Initial velocity x time + 0.5 x acceleration x time²).
Thermodynamics
- Laws of Thermodynamics:
- First Law: Energy cannot be created or destroyed, only transformed (ΔU = Q - W).
- Second Law: Entropy of an isolated system always increases.
- Ideal Gas Law:
- PV = nRT (Pressure x Volume = number of moles x gas constant x Temperature).
Electromagnetism
- Coulomb's Law:
- F = k * (|q1*q2|/r²) (Force between two charges).
- Faraday's Law of Electromagnetic Induction:
- ε = -dΦ/dt (Induced EMF = rate of change of magnetic flux).
Modern Physics
- Einstein's Theory of Relativity:
- E = mc² (Energy = mass x speed of light squared).
- Planck's Equation:
- E = hf (Energy = Planck's constant x frequency).
Understanding these formulas and concepts is crucial for tackling physics problems effectively. For comprehensive resources and study materials, consider visiting EduRev.