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Mechanics

Potential energy formula and types with examples in everyday life

Potential energy definition Potential energy is defined as:“Energy due to position is called potential energy.” Explanation of potential energy When a diver jumps off a high  board into a swimming pool,he hits the water moving pretty fast,with a lot of kinetic energy.Where does that energy come from?The answer is that gravitational force (his weight) does work on the diver as ...

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Gravitational field strength:formula & definition

Gravitation Newton’s law of gravitation Mass of earth What is Gravitational field? “The space around the earth in which earth can exert a force of attraction on other bodies is called gravitational field.”A basic fact of the gravitation is that to particles exerts forces on one another.This is a direct interaction between the two particles and is called action at ...

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Mass of earth:how to calculate mass of earth

Newton’s law of gravitation Gravitation (force of gravity) Gravitational field strength What is 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 ...

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Newton’s law of universal gravitation equation and examples

what is Newton’s universal law of gravitation? Newton’s law of gravitation can be stated as:”Everybody in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.” Newton’s universal law of gravitation equation Consider two bodies of masses m1 and ...

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Difference between electric potential and electric potential energy

Electric potential: “Electric potential at a point in electric field is the amount of work done to bring the unit positive charge from infinity to that point.” The gravitational potential at point in the gravitational field is the gravitational potential energy of a unit mass placed at that point.In this way ,the electric potential at any point in the electric ...

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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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what is the 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. Weight and mass difference: Properties of mass: Mass is the quantity of matter possessed by a body. It is a scalar quantity,which has magnitude only. Its unit is kilogram (kg). It is not ...

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Acceleration due to gravity formula and problems

What is gravitational acceleration? Acceleration of a freely falling bodies is called gravitational acceleration.The value of gravitational acceleration is 10 ms-².   Why value of g varies with altitude? Above formula shows that the value of acceleration due to gravity g depends on the radius of the earth at its surface.The value of g is inversely  proportional to the square ...

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law of conservation of energy examples and equation

State the law of conservation of energy According to law of conservation of 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.” According to Einstein’s mass energy relation: E=mc² ...

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Moment of inertia equation and formulas of rigid objects

What is moment of inertia? Moment of inertia is defined as:”The sum of the products of the mass of each particle of the body and square of its perpendicular distance from axis.” Or : The product mass and the square of perpendicular distance from the axis of rotation is known as moment of inertia. Moment of inertia formula   I ...

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