1. 1. PHYSICS
2. 2. What Is WORK ? DEFINATION :- Work is said to be done, when force acting on a body, displaces the object at the point of application in the direction of Force. EXAMPLE :- When a ball is held above the ground and then dropped, the work done on the ball as it falls is equal to the weight of the ball (A Force) multiplied by the distance to the ground (A Displacement). S.I. UNIT :- Joules (J)
3. 3. DEFINATION :- The capacity to do work is known as, ENERGY. TYPES OF ENERGY :- 1) Kinetic Energy 2) Potential Energy 3) Heat Energy 4) Thermal Energy 5) Hydel Energy 6) Tidal Energy 7) Mechanical Energy 8) Muscular Energy 9) Sound Energy 10) Chemical Energy S.I. UNIT :- Joules (J)
4. 4. Kinetic Energy DEFINATION :- Kinetic Energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. EXAMPLE :- * A planet rotating around the sun. * Water flowing in a river or falling down a waterfall.
5. 5. DEFINATION :- It Is the energy possessed by a body by virtue of its position and configuration. EXAMPLE :- * A rock sitting at the edge of a cliff has potential energy. If the rock falls, the potential energy will be converted to kinetic energy. * A stretched spring in a pinball machine has elastic potential energy and can move the steel ball when released.
6. 6. Law Of Conservation Of Energy LAW :- Law of conservation of energy states that, energy can neither be created nor destroyed, but it can be transformed.
7. 7. Definition :- Heat energy is a form of energy which transfers among particles in a substance by means of kinetic energy of those particle. In other words, under kinetic theory, the heat is transferred by particles bouncing into each other. EXAMPLE :- * The biggest example of heat energy in our solar system is the sun itself. The sun radiates heat to warm us up one the planet earth. * Automobile fuels such as gasoline are sources of heat energy, as is the hot engine of a racecar or a school bus.
8. 8. Definition :- Sound energy is produced when a force causes an object or substance to vibrate - the energy is transferred through the substance in a wave. The energy in sound is far less than other forms of energy. EXAMPLE :- * A buzzing bee. * A car horn.
9. 9. Definition :- Thermal energy is a term sometimes used to refer to the internal energy present in a system in a state of thermodynamic equilibrium by virtue of its temperature. EXAMPLE :- * Adding ice to a glass of water causes the temperature of the water to decrease because the thermal energy in the water causes the ice to melt. *A grill gives off thermal energy by burning propane.
10. 10. Chemical Energy Definition :- Chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic. EXAMPLE :- * Burning Of Wood. * Liquefaction
11. 11. Definition :- Mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object. EXAMPLE :- *Moving water such as river has mechanical energy . * A flying aircraft or bird.
12. 12. Definition :- Muscular energy is the energy exerted by the human body on any object. It can be a push or pull. The energy or power of the muscles is the muscular energy. EXAMPLE :- * A man pushing the door. * A boy Riding a bicycle.
13. 13. POWER Definition :- The Rate of doing work is known as Power. EXAMPLE :- * Find the power of the man who pushes the box 8m with a force of 15N in a 6seconds.. S.I.UNIT :- * Watt (W). 20 Watts
14. 14. This Was Done By Shrihari Tusheet Sukrit Aarshiya Rochelle