9th physics

NINTH
10 MOVING OBJECTS
This chapter explains us

1)      Motion

2)      Relative motion

3)      Difference between distance and displacement

4)      Speed and velocity

5)      Uniform and non uniform motion

6)      Acceleration
                   acceleration due gravity

7)      Graph

a.       Distance time graph

b.      Velocity time graph

c.       Equation of motion by velocity time graph 

  sums
11 LAWS OF MOTION

i)        Force and motion balanced and un balanced force

ii)      Inertia

(a)    Inertia at rest

(b)   Inertia in motion

(c)    Inertia of direction

iii)    Newton’s law of motion

iv)    About great Newton….

(a)    1^st Newton’s law of motion

^(b)       2^nd Newton’s law of motion

1.      Equation of F=ma

(c)    3^rd Newton’s law of motion

v)      Law of conservation of motion

vi)    sums

12 THE PULL OF EARTH

(1)   Universal gravitation law

(2)   Application on earth

(3)   Variation in gravity with

(i)     Altitude

(ii)   Depth

(iii) Shape of earth

(4)   Mass and weight

(5)   sums

13 WHY BODIES FLOAT

1)      Thrust

2)      Pressure in

i)        Solids

ii)      Liquids

iii)    Gases

3)      Archimedes principle

14 ENERGY THE DRIVING FORCE

(1)   Work and no work

(2)   Types of work kinetic energy

(i)     Derivation

(3)   Potential energy

(i)     Derivation

(4)   Law of conservation of energy for

(i)     Hydroelectric power station

(ii)   pendulum

(5)   Power

(i)     Its units

(ii)   History of watt

15 THE MUSIC OF SOUND

(1)   Nature and sound

(2)   Production of sound

(3)   Propagation of sound how sound travels

(4)   Sound are longitudinal waves

(5)   Characteristic of sound waves

(i)     Formula

(ii)   Speed of sound waves

(iii) uses

(6)   Range of human hearing

(i)     Range of animals range eg.. owl

(7)   Reflection of sound

(i)     Echo

(ii)   Reverberation

(iii) Sonar..

16 BONDING WITH ECOSYSTEM