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Physcis. Chapter-Work and energy whole notes.

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Course
Physics

Institution

So basically it's a physics document which contains everything we need to know about the work and energy. How it is done? It's factors, it's types, formulas and many more. It's a very important topic for all of us to know about. It contains the basics of work and energy. So it will help you people ...

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Uploaded on October 2, 2023
Number of pages 5
Written in 2023/2024
Type Interview
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physics document
chapter
chapter work and energy
class 8
class viii
study lovers
physics
basic of physics
types of work and energies

Institution Secondary school
Physics
School year 2

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PHYSICS
Chapter-Work & Energy:-
 The ability of a body to do work is called energy.
 A “WORK” Is said to be done, when a force
causes a displacement in it’s own direction.
 BOTH ENERGY AND WORK ARE SAME
QUANTITIES
 Work is directly proportional to the amount of
energy spent, i.e.->The more the energy spent,
the more work is done.

 FACTORS OF WORK-DONE DEPENDS:-
i) Amount of applied force
ii) Displacement in the direction of force applied

 >Theta is the angle between force and
displacement..
•]As we know that work is said to be done
when a force causes a displacement in its own
direction. But sometimes, we see that the
work is done, but the displacement caused by
the force is not in its own direction.So during
these situation, then angle between the force

, and displacement is called theta, as described
above!
 Symbol of theta->[Q]
 So, in this type of WORK-DONE, the WD(WORK-
DONE ) is called Force(F) multiplied by
displacement(S) and multiplied by COSQ(Theta)
 So. WD=F.S.COSQ [As, Q is the angle between
force and displacement]

1)TWO TYPES OF QUANTITIES:-
i) Vector Quantity->When a applied force causes a
displacement in a specific direction.
ii) Scalar Quantity->When a applied force causes a
displacement in any direction.
 Units Of WORK-DONE:--
 In S.I. unit=Joule (J)
 In CGS unit=Erg.
 1 Joule=10 raised to the power 7 ergs.

1. WORK-DONE are of two types:-

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