momentum and impulse

1. HOME Material Tentang Saya
MOMENTUM
AND
IMPULSE
PHYSICS EDUCATION PGMIPAU 2014PHYSICS EDUCATION PGMIPAU 2014indicator
Basic Competencies

2. HOME Material Tentang Saya
PHYSICS EDUCATION PGMIPAU 2014PHYSICS EDUCATION PGMIPAU 2014
Basic Competencies
indicator
MOMENTUM
AND
IMPULSE

3. GERAK LURU
HOME
Materi ABOUT ME
INTRODUCTION
MOMENTUM
IMPULSE
COLLISION
Perfectly elastic collision
collision RESILLIENCE
PORTION
RESSILIANCE NO AT ALL
PHYSICS EDUCATION PGMIPAU 2014PHYSICS EDUCATION PGMIPAU 2014
Basic Competencies
indicator

4. introduction
 Before we know the background discussion Impuls and Momentum Linear then
we must first understand what is meant by Impulse and Linear Momentum .
Impulse is a vector quantity whose direction parallel to the direction of the
force and momentum changes Causes and Linear Momentum is momentum
possessed objects moving on a straight path Have witnessed the collision
between two vehicles on the road . What happens when two vehicles collided .
condition of the car or motorcycle may fall apart . If we review from physics ,
fatal or not the collision between the two vehicles is determined by the
momentum of the vehicle. In physics there are two types of momentum ie
linear momentum and angular momentum . Sometimes abbreviated linear
momentum momentum .

5. Momentum is:
the tendency of a moving
object to continue moving at
a constant speed,
or the multiplication of
mass with velocity object.
formulated:
P = m.v
By: p = momentum (kg m /
s)
m = mass of the object (kg)
v = velocity (m / s)

6.  Two balls each having a mass m1 and m2, where
m1 = m2. m1 m2 moving towards the stationary
(v2 = 0). After the collision velocity turned into v1
'and v2'. When F12 is the style of m1 m2 used for
mashing and F21 style of m2 used for mashing
m1, then according to Newton's Third Law:

7.  Total momentum of the object 1 and object
2 before and after the collision is equal /
fixed. This law is called the Law of
Conservation of Momentum.

8.  Impulse is defined as:
the product of the force by the time required
by the force to moving .Impuls can be
formulated:
I = F. ∆ t
By: I = impulse
F = force (N)
Δt = time interval (s)

9.  According to Newton's 2nd law:
F = m a
By substituting the second equation is
obtained
I = F Δt = mvt – mv0
with:
MVt = momentum of the object, as the speed
vt
MV0 = mementum object when the velocity
v0

10. Impulse as momentum changes
The concept of impulse and momentum changes can be viewed
as a concept that arises from the application of Newton's second
law , namely : (1.3)F ma
m
Play
Analisis Animasi
m
F v1
m
v2
Animation : Stick provides a
force ( F ) on the ball of mass (
m ) , then the ball velocity
changes ( v = v1 - v2 ) in the
interval ( t ) .
A change of pace on the object will give the average
acceleration of :
2 1
(1.4)
v v
a
t



The substitution of equation ( 1.4 ) to equation ( 1.3 ) ,
obtained
 
2 1
2 1 (1.5)
v v
F m
t
F t m v v
 
  
 
  
Magnitude F t called impulse , which means that the impulse is the
change in momentum.
!
Animasi

11. The working principle is the main
rocket conservation of momentum .
The number of rockets on the runway
momentum equal to zero . When a
rocket is launched , has sprayed
down the burning of a high-speed jets
of gas is made ​​rocket moves
upwards to compensate for the gas
momentum .
The law of conservation of momentum on
the rocket , namely :
Play
INDONESIA
Animasi 9:
( ) ( )
(1.15)R
mv m
F v
t t
 
 
 
desain: bugishq blog
1 1 2 2
1 1 2 2
0 ' '
' ' (1.14)
m v m v
m v m v
 

Impulse is the change in momentum
(F t = p= (mv)):
So, force rockets is :

12.  The collision was an event meets two moving
objects. When the collision apply the law of
conservation of momentum but not always
apply the law of conservation of kinetic
energy. Maybe some kinetic energy is
converted into thermal energy due to the
collision.

13. A collision occurs when a moving object on another
object that is stationary or moving too . For
example , a billiard ball collision or collision
between two cars on the highway .
A B
Play
desain:bugishq blog
Animasi 4
The collision that occurs when the mass center point of the
object toward the center of mass of the object point to
another . As shown in the following animation .
amount of mechanical energy of the system ( objects that collide )
is not always fixed , likely after the collision energy turns into heat
. However , the amount of momentum of the system is always fixed
.

14. Perfectly elastic collision
Perfectly elastic collision is a
collision between two objects
remain the same amount of
mechanical energy is great,
just before and after the
collision . In other words ,
perfectly elastic collision no
energy is lostThus , the elastic perfectly valid :
law of conservation of momentum
law of conservation of mechanical
energyFor example , two balls with the
respective masses mA and mB ,
initially moving with velocity v1 and
v2 . after the collision , the speed of
the ball becomes v1 ' and v2 ' . Note
animations
desain: bugishq blog
v1 v2
►Bola sebelum tumbukan
Play
►Bola saat tumbukan
v2’v1’
►Bola sesudah tumbukan
►Perhatikan animasinya
Animasi 5

15. 
In the collision elastic portion only applies
the Law of Conservation Momentum ,
while the Energy Conservation Law does
not apply , because the kinetic energy
after the collision smaller objects before
the collision . It is caused when there is
no collision energy into heat or sound
energy .
1. Apply the law of conservation of
momentum ' '
1 1 2 2 1 1 2 2m v m v m v m v  
Feature collision resilient portion :
2. Do not apply the law of conservation of
mechanical energy
3. The coefficient of restitution ( e ) valued at
between zero and one : 0 1e 
desain: bugishq blog
lantai
Play
Animasi :

16.  Elastic collision not at all characterized by:
 1.Applicable law of conservation of
momentum.
 2.Not applicable law of conservation of
kinetic energy.
 3.Restitution coefficient of zero

17. The collision between two
objects with no resilience at all
, then after the collision of the
two bodies will have the same
speed ( v'1 = v'2 = v ' ) , because
the coefficient of restitution
equal to zero ( e = 0 ) Note
animation 8 !
' '
1 1 2 2 1 1 2 2m v m v m v m v  
In general, the impact resilience is not at all apply the law of
conservation of momentum
Because the speed of the two objects after the collision the same ,
namely :
Then the law of conservation of momentum equation ,
becomes :
desain: bugishq blog
Play
Animasi :
1 2
v11 2v2
v'1 =v’2 =v’
' ' '
1 2 (1.12)v v v 
  '
1 1 2 2 1 2 (1.13)m v m v m m v  

18. ABOUT ME
NamE : KRISNA SURYANTI
TTL : SUKA MAKMUR, 19 mei 1996
RELIGION : Islam
SEX : Perempuan
ADDRESS : RT. 04, RW. 01, Desa Mendalo
Indah, Perum Mendalo Asri, Blok P
EDUCATION : SD N 153/IX Mekar Sari M (2008)
SMP N 12 Muaro Jambi (2011)
SMA N 4 Muaro Jambi (2014)
S-1Pend.Fisika,UNJA (sedang proses)

19.  shows the relationship between the concept
of impulse and momentum to solve the
problem of collisions

20.  • Formulating the concept of impulse and
momentum, the relationship between them, and
their application in life (eg rocket)
• Formulate the law of conservation of
momentum for a system without external forces
• Integrating the law of conservation of energy
and momentum conservation for many collision
events