Mechanics

Dot product and cross product are two types of vector product.The basic difference between dot product and scalar product is that dot product always gives scalar quantity while cross product always vector quantity.Dot product is always used to calculate angle between two vectors. What is dot product of two vectors? When two vectors are multiplied with each other and answer ...

Newton’s three laws of motion are the 3 physical laws ,these laws of motion laid the foundation for classical mechanics.These laws explain the relation between forces and the body on which these forces acted upon.Newton’s first law of motion gives the qualitatively definition of force,Newton’s second law of motion gives the quantitative measure of the force,while Newton’s third law of ...

Force is the external agent which produces motion or tends to produce motion or it stops motion or tends to stop motion.Basically there are two types of forces,contact forces and non contact forces.Gravitational force,electric force,magnetic force,nuclear force,frictional force are some examples of force. Now! We learn in detail about kinds of force…… Here’s the deal: What is Force? “A force ...

Scientific notation and significant figures are two important terms in physics.In scientific notation numbers are expressed by some power of ten multiplied by a number between 1 and 10,while significant figures are accurately known digits and first doubtful digit in any measurement.  Scientific notation definition In scientific notation a number is expressed as some power of ten multiplied by a ...

Newton’s first law of motion examples are given in the list: A book lying on the table remains at rest as long as no net force acts on it. A moving object does not stop moving by itself. A rolling ball on rough surface or ground stops earlier than on smooth surface,because rough surfaces offer more friction than smooth surface.If ...

Conservative and non conservative force examples are given in which Gravitational forces,Magnetic force,Electrostatic force,Elastic spring force,Electric force are conservative force examples while frictional force,air resistance force,force of gravity are non conservative force examples. What are conservative forces? Those  forces which allows the opportunity of two way conversion among potential and kinetic energies are said to be conservative forces. Conservative force ...

Vector dot product and cross product are two types of vector product,the basic difference between dot product and scalar product is that in dot product,product of two vectors is equal to scalar quantity while in scalar product,product of two vectors is equal to vector quantity.  dot product Vs cross product   Dot product or scalar product  Cross product or vector ...

First equation of motion (Vf =Vi + at)  deals with final velocity,initial velocity,acceleration and time.We can use 1st equation of motion to find final velocity,initial velocity,acceleration and time. First equation of motion derivation Consider a body is moving with initial velocity “Vi” with uniform acceleration “a” as shown in figure.After time “t” its velocity becomes “Vf”.The total distance covered by ...

Kepler’s laws of planetary motion are expressed as:(1) All the planets move around the Sun in the  elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to  Sun sweeps out equal areas in equal intervals of time.(3) The square of the period of any planet about the sun is proportional to the cube of the ...

Atmospheric pressure is the weight of air per unit area.Its value varies with altitude.The value of  atmospheric pressure at sea level is 1.013 x105 N/m2    The Earth is surrounded by a cover of air called atmosphere. It extends to a few hundred kilometers above sea level. Just as certain sea creatures live at the bottom of ocean, we live at the ...