The presentation is mean for secondary or O Level physics students

1. High School or O-Level Physics
~Lalit Kishore, Plenum School

2. Force: Qualitative Definition
 The vector physical quantity that changes or tends to
change...
 The state of motion (speed and / or direction)
 Shape of an object
 Symbolically represented by ‘F’
 Visually represented by a line with an arrow head

3. Defining momentum: Towards
force measurement
 Momentum is the quantity of motion produced by a
moving object
 Momentum depends on the
 mass of the moving object
 velocity of the moving object
 The greater the mass of a moving object, the greater is
its momentum
 The greater the velocity of a moving object, the
greater is its momentum

4. Momentum: Two basic laws
 Momentum ‘p’ is
 Directly proportional to mass ‘m’ of the moving object
 Directly proportional to velocity ‘v’ of the moving
object
 In other words
 On combining
p mv
Or p = Kmv (where K is the constant of proportionality)
But K = 1
Therefore p= mv

5. Momentum: Two basic laws

6. Defining force quantitatively:
Mathematization of language of physics
 Force is defined quantitatively as
 Force is the rate of change of momentum
 Force as an equation can be written as
 Force = change in momentum / time
= mass X change in velocity / time
= mass X acceleration
This equation made it possible to
measure force and define a standard
unit of force

7. MOMENTUM: RHYTHMIC NON-POEM
Called is
The quantity of matter
In an object -
Mass! Mass!! Mass!!!
~*~
Likewise, called is
The quantity of motion
In an object –
Momentum! Momentum!!
~*~
Mathematically,
Measurably, the momentum is
The product of mass ‘n velocity
Momentum equals
Mass into velocity
‘m into v’
~*~
The rate of change of
Momentum is -
Force! Force!! Force!!!
~*~