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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. This Was Done By Shrihari Tusheet Sukrit Aarshiya
Rochelle