UNIT (1) CHAPTER (1) - Mr. Ahmed Samir
UNIT (1) CHAPTER (1)
change in displacement = S
change in time
t
work time
N.m or Joule
J
s = watt
L2 L3 L.T-1 M.L.T-2 M.L2.T-2 M.L2.T-3
Weight of body = mass x acceleration due to gravity W = Mg = M 9.8 Newton's
Conversion symbols
Deci (d) X 10-1
centi (c) X 10-2
mili (m) X 10-3
micro nano (n)
() X 10-6
X 10-9
pico (p) X 10-12
femto (f) X 10-15
kilo (k) X 103
Mega (M) X 106
Gega (G) X 109
gm X 10-3 kg
ton X 103 kg
Angstrom A0 X 10-10 m
liter (L) X 10-3 m3
Kg weight X acceleration due to gravity (N)
1
UNIT (1) CHAPTER (1)
Centimeter
102
10
Meter
10-2
10-1
103
10-3
1m = 1 x 102 cm = 103 mm 1m2 = 1 x (102)2 cm2 = (103)2mm2
1m2 = l x l04 cm2 = 106 mm2 1m3 = 1 x (102)3 cm3 = (103)3mm3
1m3 = 1 x 106 cm3 = 109 mm3
Millimeter
Liter
103
10-3
106
m3
10-6
* To analyze the vector into two components
103 10-3
Cm3
Opposite Fy = F Sin
Hypotenuse
Adjacent
F
Fx = F Cos
Sin
=
Opp hyp.
.................. Opp. = hyp. Sin
Cos
=
Adj hyp.
..................
Adj. = hyp. Cos
Tan = Opp .................. Opp. = Adj. tan
Adj.
2
UNIT (1) CHAPTER (1)
Important Law
2. Square
Area = L2
L
Perimeter = 4 L
L
1. Cube Area of one face = L2 Total area = 6L2 Volume = L3
L L L
3. Rectangle
W
Area = L X W Perimeter = 2 ( L + W ) L
6. Cuboid
Area of base = L X W Volume = L X W X h = Area of base X h
h L W
4. Circle
7. Sphere
Area = R2
R
Surface Area = 4R2
R
Perimeter (circumference) = 2 R Volume = 4 R3
3
5. Triangle
Sin = Y
Z
Z
Cos
=
X Z
X
Tan
=
Y X
Height
Area
=
1 2
base
x
heightBase
8. Cylinder
Y
R
Area of base = R2 Volume = Area of base X h
= R2h
3
UNIT (1) CHAPTER (1)
y = mx where (m) is slope
C
y = c - mx where (m) is slope (c) is constant
C
y = mx + c where (m) is slope
(c) is constant
- C y = mx - c where (m) is slope (c) is constant
y = ax2 Where (a) is constant
y
=
a X
where (a) is constant
4
UNIT (1) CHAPTER (1)
Lesson One Electric current & Ohm's law
Electron current (Actual current)
Conventional current
1- Electric source " To create electric potential difference between the terminals the conductor "
2- Closed circuit
+ Battery
?
5
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