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Mechanics

Potential energy examples in everyday life

Energy due to the position is called potential energy. It is represented as P.E.It is a scalar quantity.Its unit is joule.P.E is the type of mechanical energy, which is defined as: Energy due to motion and position. Now! Before we discuss the explanation of P.E, we give some mechanical energy examples. Examples of mechanical energy Moving wind when it turns ...

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Mass of earth and radius in physics with derivation and problems

How to calculate the mass of earth? Consider a body of mass m on the surface of the earth.Let the mass of the earth be  M and radius of the earth be R,The distance of the body from the center of the earth will also be equal to the radius R of the earth.According to the law of gravitation,the gravitational ...

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Difference between centripetal and centrifugal force with examples

Centripetal force definition “The force which is directed towards the centre of circle is called centripetal force.” Explanation: Consider a body moving with uniform speed in a circular path.In this case velocity changes only in direction and not in magnitude.Applying Newton’s first law of motion we find that some external force must be acting on the particle.Without presence of external ...

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difference between mass and weight in tabular form

Unfortunately, weight and mass are often considered to be same quantities and misused in daily conversations.It is therefore essential for you to differentiate between these two physical quantities. 5 differences between mass and weight of a body Properties of mass Mass is the quantity of matter possessed by a body. It is a scalar quantity,which has magnitude only. Its unit ...

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law of conservation of energy:Definition,formula and examples

According to the law of conservation of mechanical energy:”Energy can neither be created nor is it destroyed.It can only be transformed from one form to another.A loss in one form of energy is accompanied by an equal increase in the other forms of energy.The total energy remains constant.” Explanation The kinetic and potential energies are both different forms of the same ...

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gravitational potential energy : Definition,formula and examples

Gravitational potential energy is defined as the “energy of an object due to Earth’s gravity”.OR it is the product of objects weight and height.It is the most common example of P.E. Its formula is:       W = mgh It means the higher an object the higher will be its Gravitational P.E. Examples of gravitational potential energy in everyday life ...

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Viscosity : Definition,formula,applications and Poiseuille’s law

What is Viscosity? “Viscosity is the  internal friction in a fluid.”Viscous forces opposes the motion of one portion of a fluid relative to another.Viscosity is the reason it takes effort to paddle a canoe through calm water,but it is also the reason the paddle works.Viscous effects are important in the flow of fluids in pipes,the flow of blood,the lubrication of ...

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Work energy theorem derivation:examples and problems

Work energy theorem states that:“The net work done by the forces acting on the body is equal to the change in kinetic energy of the body.”Mathematically it is expressed as: Wnet = Kf –Ki = ∆k An unbalanced force applied to a particle will certainly change the particle’s state of motion. Newton’s second law provides us with one way to analyze this change ...

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Bernoulli equation derivation with examples and applications

Bernoulli equation definition Bernoulli’s equation is defined as:”The sum of pressure,the kinetic and potential energies per unit volume in a steady flow of an in compressible and non viscous fluid remains constant at every point of its path.”Mathematically it is expressed as: Bernoulli’s principle formula P+ ρgh +1/2 ρv2 =constant Bernoulli’s equation,which is a fundamental relation in fluid mechanics,is not a new ...

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Continuity equation derivation in fluid mechanics with applications

General Concept of Fluid Flow One way of describing the motion of a fluid is to divide the fluid into infinitesimal volume elements,which we may call fluid particles,and to follow the motion of each particle. If we knew the forces acting on each fluid particle,we could then solve for the coordinates and velocities of each particle as functions of the ...

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