Physics Kida

Physics Formulas is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves. Physics Formulas is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. BEST APP FOR PHYSICS FORMULAS BASIC PHYSICS FORMULAS - Best App For Physics Formulas  The branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms. The dictionary definition of  physics  is “the study of matter, energy, and the interaction between them”, but what that really means is that physics is about asking fundamental questions and trying to answer them by observing and experimenting. Basic Physics. Physics is the natural science that studies the matter and its motion and behavior through space and time and that studies the related entities o...

Derived Units "The units of derived physical quantities which are derived from basic units or fundamental units are called  derived units ." Rules for writing SI units i) Full name of the unit always starts with small letter even if named after a person. e.g. Newton, joule and not Newton, Joule. ii) A symbol for unit named after a person should be in capital letters e.g. 'N' for Newton, joule and not Newton, Joule. iii) Symbols for all other units are written in small letters. e.g. 'm' for a meter,'s' for second etc. iv) Symbols of units are not to be expressed in plural form. e.g. 25 m and not 25 ms. v) Full stop and any other punctuation mark should not be written after the symbols e.g. kg and not kg or N and not N. Table of some SI derived units expressed in SI base unit Sr. No. Physical Quality Name of SI Unit Symbol 1 Area Square meter m2 2 Volume Cubic meter m3 3 Density Kilogram per cubic meter Kg/...

Fundamental And Derived Units: The measurable property of a material body is called physical quantity. For example Length, mass, area, density, force, volume etc. The physical quantities are classified into two types. i) fundamental physical quantities, ii) derived physical quantities. a. Fundamental physical quantities The physical quantities which do not depend on other physical quantities for their measurements are called fundamental physical quantities or basic physical quantities. Fundamental units or basic units The unit of fundamental physical quantity is called fundamental units. These are not derived from any other units and cannot be further resolved into other more simpler units. The number of basic units are only seven. Sr. No. Basic Physical Quantity Name of the SI unit Symbol 1 Length meter m 2 Mass Kilogram kg 3 Time second S or sec 4 Temperature kelvin K 5 Electric Current ampere ...

SI Units Use of different systems of units became inconvenient for exchanging scientific information between different part of the world. Hence Oct. 1960, at the Eleventh International General Conference of weights and measures held in Paris. It decides to have a common system of units called System International d' units. The international system of units is abbreviated as SI system. The French name for this system is 'system Internationale d unities'. This system is an improved and extended version of the MKS system of units. The three fundamental units of mass, length and time are sufficient to obtain the units of physical quantities in mechanics quantities which come across in other branches of only, but not sufficient to obtain the units of physical physics like optics, electrodynamics, heat etc. Therefore, the general conference of weights and measures decided new system of units with the standard scheme of symbols, units and abbreviations called as SI system. Ad...

System Of Units A set of fundamental units and derived units together is called a system of units. In physics, there are two types of units such as fundamental and derived. In mechanics, most of the physical quantities depend upon three fundamental Physical quantities such as length, mass and time. Therefore the scientist Gauss in 1832, suggested selecting three fundamental physical quantities for expressing unit of derived physical quantities. There are different types of physical quantities. For the measurement of each physical quantity, we require an Independent unit. Hence for convenience system of units was developed. Following are the commonly used systems of units. 1) CGS system: [Centimeter Gram Second] It is a French system in which C stands for centimeter G stands for gram and S stands for a second. In this system, basic units of length, mass and time are centimeter, gram and second respectively. This is a metric system. 2) FPS system: [Foot Pound Second] It is a...

Introduction   Physics is the branch of science which deals with the study of nature and natural phenomenon. According to the Einstein study of physics means a study of energy, mass, and their interaction. Mass and energy are interconvertible to each other. The mass is converted into energy and energy is converted into mass. These are not two distinct quantities.   The physics is often called as 'science of measurement. It measures the physical quantities and established the relation between them.   Measurement of physical quantity involves comparison of the physical quantity with its accepted standard unit. The result of a measurement of a physical quantity is expressed in terms of number or digit and the symbol of a unit. If a large number of physical quantities are measured. Most of the physical quantities are expressed in terms of the limited number of units. Need Of Measurements   In physics, we are to deal with a large number of physical quantities like...

Angular Displacement     Consider a particle performing circular motion, along the circumference of the circle with centre O and radius r, in anticlockwise direction as shown in figure. When the particle moves from P to Q in a short time interval ‘ ’, the angle traced by the radius vector at the centre of the circle is  and the arc length Definition:    The angle traced by the radius vector at the centre of the circle performing circular motion, is called angular displacement. It is denoted by letter or . By definition of arc length Arc length ( ) = Radius vector (r)  X  angle traced by the radius vector     It is measured in radian. It is a dimensionless quantity since it is the ratio of two similar quantities. It is a conditional vector. For infinitesimal values of angular displacement it is a true vector and for any finite values it is a scalar quantity, since it does not obey the commutative law of vector addition. ...

Circular Motion In our daily life, we observe some common examples of motion, the motion of an object along a straight line, curved path, to and fro and about a fixed point. The motion of the body along the straight line is called linear motion. The motion of the body about a fixed point is called rotational motion. In a similar way, the motion of the body along the circular path is called circular motion. The motion of an object or body along the circumference of a circle is called the circular motion. E.g: 1. The motion of an electron around the nucleus. 2. The motion of the earth around the sun is approximately circular motion. 3. The vertical circular motion of the object. 4. The motion of the blades of a fan and motion of hands in a clock Position vector or Radius vector: " It is a vector drawn from the center of a circle to any position of a particle on the circumference of a circle."    It is always directed away from a center of the circle. It's dir...