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)

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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.

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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

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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

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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

?

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