Important Laws of Physics
- Archimedes’ principle
This principle was discovered in the 3rd century BC. by a Greek mathematician. Archimedes states that when a body is partially or completely immersed in a fluid, it experiences an upward force equal to the weight of the fluid displaced by it i.e. Its apparent weight is equal to the weight of the liquid being reduced.
- Avogadro’s Law
It was discovered in 1811 by Anedeos Avagadro, an Italian scientist. This law states that equal volumes of all gases under equal conditions of temperature and pressure contain equal numbers of molecules.
- Ohm’s Law
It states that the current flowing through a conductor between two points is directly proportional to the potential difference between the two points provided the physical state of the conductor and temperature etc. do not change.
- Newton’s laws
- Law of Gravitation: Objects attract each other with a force that is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them. Therefore, for objects on or near the Earth, the mass of the Earth is much greater than the object, and so the gravitational force between them pulls the object toward the Earth. That is why lead and feathers fall at the same rate in space.Newton’s first law of motion.A body continues in its state of rest, or uniform motion in a straight line, unless compelled by external forces to change that state. It is also known as Law of Inertia.Newton’s second law of motion.The rate of change of velocity is proportional to the applied force and is in the direction of the straight line along which the force acts. In other words “force equals mass multiplied by acceleration”.
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