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# Amit sharma and mohineesh sharma

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### Transcript

• 1.
• 2. Submitted To - Mrs Ritu Sexana Submitted By - Amit Sharma and Mohineesh Sharma
• 3.
• 4. The intuitive meaning of work is quite Different from the scientific definition of Work . In everyday activity , the term â€˜ workâ€™ is used equally for mental and physical work involving muscular force.
• 5.
• In physics , the term work is used in special technical sense and has a much more precise definition .
• DEFINITION
• When force is acted on a body and the body get displaced through a distance
• then work is said to be done .
• 6.
• There are two conditions that must be
• satisfied in work done by a body .
• A force is applied on the object .
• The object be displaced from its original position.
• 7.
• Mathematically Work is defined as the product of force acting on the body and
• displacement is produced in the body .
• Formula of work is :
• W = FScosÎ¸
• 8. 2 of 10 Peter Loader @ TLT Î¸ (Angle in degree) COSÎ¸ O 1 90 0 180 -1
• 9.
• CASE 1
• When the direction of force and displacement are same .
• we know
• W = FScosÎ¸ (Î¸ = 0 [in degree] )
• W =FScos180
• W =FS* 1
• W =FS
• Example- when a body is dropped from a certain height.
• 10.
• SI Unit
• SI unit of work = SI unit of force * SI unit of displacement
• Joule (J) = N * m
• J = Nm
• 11.
• CGS Unit of work = CGS unit of force *
• CGS unit displacement
• erg = dyne * cm
• erg = dynecm
• 12.
• We know
• 1j =1N * 1m
• 1j = 100000 dyne * 100 cm
• 1j = 10000000 erg
• 13.
• 1 kilo Joule = 1000 Joule
• 1 Mega Joule =1000000 Joule
• 14. ENERGY KINETIC ENERGY POTENTIAL ENERGY MECHANICAL ENERGY LIGHT ENERGY HEAT ENERGY SOLAR ENERGY SOUND ENERGY ELECTRIC ENERGY NUCLEAR ENERGY CHEMICAL ENERGY HEAT ENERGY TIDAL ENERGY WIND ENERGY HYDRO ENERGY
• 15.
• Energy of an object is defined as its capacity for doing work and it is measured
• by the total quantity of work it can do.
• OR
• Ability to do work is called energy .
• 16.
• SI unit of energy is same as the SI unit
• of work. i.e. joule (J).
• 17.
• There are many types of energy but Kinetic energy and Potential energy have mathematical .
• 18.
• Solar Energy
• Heat Energy
• Light Energy
• Chemical Energy
• Wind Energy
• Hydro Energy
• Sound Energy
• Electric Energy
• Magnetic Energy
• Tidal Energy
• Nuclear Energy
• Mechanical Energy
• 19.
• Solar Energy
• The energy radiated by the sun is called solar energy used in photosynthesis .
• Heat Energy
• When energy released by gas , oil , petroleum products is called heat energy .
• 20.
• Light Energy
• Energy which produce sensation of vision.
• Chemical Energy
• Energy which is produced by fuels , chemicals etc.
• 21.
• Wind Energy
• Energy produced by moving air .
• Hydro Energy
• The energy produced by flowing water is called hydro energy.
• 22.
• Sound Energy
• Energy which produced by the vibration of object and produced sensation of hearing .
• Electric Energy
• Energy Produced by flow of charge .
• 23.
• Magnetic Energy
• Energy produced by magnet .
• Tidal Energy
• Energy produced by high and low tides .
• 24.
• Kinetic Energy
• The energy in a body by virtue of its motion is called Kinetic energy .
• Potential Energy
• The energy in an object by virtue of its position or configuration is called its potential energy .
• 25.
• Nuclear Energy
• The energy which produced by nuclear reactions is called nuclear energy .
• Mechanical Energy
• The sum of kinetic and potential energy is called mechanical energy .
• 26.
• Mathematical definition of kinetic energy is equal to half the product of mass and square of velocity .
• 27.
• Mathematically potential energy is equal to the product of mass , acceleration due to gravity and height .
• P.E = M * g * H
• 28.
• The conversion of energy from one form of energy to another form of energy is called energy transformation .
• 29.
• According to law of conservation of energy can neither be created nor be destroyed only it can be destroyed from one form of energy to another form of energy .
• 30. POWER
• 31.
• Rate of doing work done is called power .
• OR
• Work done per unit is called power .
• W =Work Done
• T = Time
• P = W / T
• 32.
• si unit of power = si unit of wok / si unit time
• W = J /
• SI Unit of power is Watt [ W] and is named in the honor of James Watt .
• 33.
• Practical unit of power or a unit which is exclusively used in engineering or in automobiles is called horse power (hp) .
• 1 hp = 746w
• 34.
• It is defined as the ratio of total workdone by the body to the total time taken by the body
• AP = Total workdone / Total time
• 35.
• Commercial unit of electric energy is Kilowatt-Hour (KWH).
• Commercial Unit of electric energy i.e. KWH is used in household industries for measuring electric energy consumption .
• 36. THANK YOU