Laws of Physics
Laws of Physics have a huge impact in stating facts. These laws are derived and proved through empirical observations. Everything that prevails around us has some connection with Physics.
Physicists have derived many laws with proof to illustrate these facts. In other words, the laws of Physics are the kind of explanation that classifies all physical phenomena.
Most of the laws of Physics are not that easy to derive. All scientific researchers are dedicatedly working to establish a law. All these laws given by physicists are under continuous observation by the scientific community and are updated from time to time.
Physicists have explained so many facts in the form of laws to state the phenomena happening around the universe. Here, you will find a brief knowledge of some basic laws of physics and know all about these.
State Hooke's Law
Hooke’s law states that within the elastic extent of a material, the material’s strain is proportional to the material’s stress. The atoms and molecules get a deformation of an elastic material when it gets stretched. It stays stretched for the total time of application of stress. When stress gets removed, they go back to their normal form.
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F = – k. X
Here, F = Force
x = Extended length
k = Spring constant or constant of proportionality
Snell's Law of Refraction
This law states the connection between the angle of incidence and the angle of refraction.
Here is the dedicated Snell’s Law of Refraction:
n1sinӨ1=n2sinӨ2
Gas Laws Physics
Under this section, there are three more laws:
Boyle’s Law
Charles’s Law
Avogadro’s Law
Also, ideal gas law is another part of the gas laws in Physics. These are as follows:
Boyle’s law = PV = k
Charles’s law = V/T = k
Avogadro’s law = \[\frac{v_1}{n_1}\] = \[\frac{v_2}{n_2}\]
Ideal gas law = PV = nRT
Law of Conservation of Energy
This law explains that energy can’t be created and can’t be destroyed. The only possibility is that the energy always changes its state from one to another.
When a system is a closed one, the conservation of energy takes place.
We can calculate a system’s total energy as:
UT = Ui + W + Q,
Where
Q = Heat
W = Work
UT = Total Conservation of Energy
3 Laws of Thermodynamics
The three laws of thermodynamics are mentioned below.
The First Law of Thermodynamics
The Second Law of Thermodynamics
The Third Law of Thermodynamics
Also, another law is associated with thermodynamics, known as the Zeroth law of thermodynamics
Three Laws of Motion by Newton
Newton also stated three laws of motion. They are known as the first, second, and third laws of motion.
First Law: It states that a body at uniform motion or rest will remain in its original state until and unless an external force is applied to it.
Second Law: In short, force is directly proportional to the product of the mass of the body and its acceleration.
Third Law: There is an identical and reverse reaction for every action.
Law of Electrostatics
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Coulomb’s law of electrostatics is the important law of electrostatics. It states that a force F is developed when two different charges, q1 and q2, are placed together with some distance d between them.
The mathematical derivation is:
\[F=\frac{1}{4\pi \xi _0}\frac{qQ}{r^2}=k_e\frac{qQ}{r^2}\]
or, we can write it simply as:
\[F=k\frac{q_1q_2}{d_2}\]
List of all Physics Laws PDF
Here is the list of all Fundamental Laws of Physics:
Carnot’s Theorem
Raman Scattering
Coulomb’s Law
Faraday’s Laws of Electrolysis
Planck Equation
Kirchhoff’s law
Newton’s law of universal gravitation
Electric Potential due to a point charge
Zeroth Law of Thermodynamics
Gauss’ Law
The first law of thermodynamics
Wien's Displacement Law
Joule’s Laws
Radioactive Decay Law
Superposition Principle
Newton’s Laws of Motion
Laws of Thermodynamics
Laws of Friction
Heisenberg Uncertainty Principle
FAQs on Basic Laws of Physics
1.To displace a spring for 5 cm from its original state, about 500N force is required. If the force is constant on the spring to make it stable, then calculate the spring constant of the spring.
The distance should be converted into meter from centimeter.
5 cm = 0.05 m
According to Hooke’s law:
F = – k.x
In the above expression, the negative sign should be removed as we are only dealing with the magnitude of spring constant.
So, k = 500 N/0.05 m = 10000 N/m.
2.Explain the Acceleration of Gravity?
The acceleration acquired by a freely falling body due to the gravity of the earth is called acceleration due to gravity. When we toss a coin, it comes back to us with some acceleration. This is due to the acceleration of gravity. The value of acceleration due to gravity is found to be 9.807 m/s².
3.How do you explain Ohm’s Law?
Ohm’s law explains that the current (I) which flows through a circuit is directly proportional to its potential difference (V) at constant temperature. It also says that the current is inversely proportional to the circuit’s resistance (R).
Mathematically,
V = I * R.
