Class notes
Physical Sciences: Gravity and Electric fields
- Course
- Physical Sciences
- Institution
- 12th Grade
This pdf covers the gravity and electric fields of the physical sciences IEB syllabus with worked examples
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, and electric fieldsGravity
universal
Law of
gravitation : Each particle with mass in the universe attracts
that is
every
other particle with a force
directly
~
Proportional to the product of the masses and
inversely
of the distance between their
M
, Y Y Mz proportional to the
square
F Centres .
F = GM ,
M2 Ge universal gravitational constant 6, 3x10" N . m?
Kgh
r2
Gravitational field : The
gravitational force acting per unit mass
g. f
Mass = Scalar Weight-rector
is exerted object. The other
Weightlessness is when
mechanical forces that
only gravity of weight
on an
absent
cause feeling are
Experienced in a vacuum free fall far from planets
, ,
away
Relationship between g and G
GmMimg GmMg
F = =
Electrostatics
Elections more from an
object with more electrons to an object with less
electrons
Imc = 1x10
-
3
Forces between charges "
Strength of Force :
INC = 1x10 C
Like
charges repel 1x10"C
-
magnitude of charge In) =
distance between centres
opposite charges attract
-
*
1p)
= 1x10 C
Magnitude of charges
the force between particles increases
If
charge on particle increases ,
by the same factor
Distance between charges
electrostatic force decreases when distance increases
factor equal to the inverse to the square of the distance
changes by a
-
electron 6 x10 ( Proton Charge 1 6x10 C
charge ,
: -1
: ,
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