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KendriyaKendriya vidyalayavidyalaya
baranbaran
name – shashanK gargname – shashanK garg
class – ixclass – ix
subject – sciencesubject – science
(Physics)(Physics)
roll no. – 32roll no. – 32
session – 2018-2019session – 2018-2019
motionmotion
There are two states of anThere are two states of an
object :-object :-
• Rest stateRest state
•Motion stateMotion state
Rest state
If the position of an
object is not changing
with time , then that
object is in rest motion .
Motion state
If the position of an
object changes with time,
then that object is in
motion state .
Scalar Quantities
• The physical quantities which
requires only magnitude to
describe them and there is no need
to direction are known as scalar
quantities .
• Examples :- Distance , speed ,
time , volume , area , density ,
temperature , pressure , etc. .
Vector Quantities
• The quantities which require
direction as well as magnitude
to describe them are known as
Vector Quantities.
• Example :- Displacement ,
velocity , acceleration , force ,
etc. .
Distance
 The length of actual path
travelled by an object is
known as distance covered
by the object .
 It is a scalar quantity .
Displacement
 The shortest distance
travelled between initial
position to final position is
known as Displacement .
 It is a vector quantity .
Speed
 Speed of a body is the
distance travelled by it per
unit time .
 Speed = distance travelled
time taken
 It is a scalar quantity .
 Its unit is m/s .
Velocity
 Velocity of a body is the
distance travelled by it per
unit time in a given direction.
 It is a vector quantity .
 Velocity = displacement/time
 Its unit is m/sec .
Acceleration
 The rate of change of velocity
of an moving object is known
as its Acceleration .
 It is a vector quantity .
 a = final velocity – initial V.
time taken
 Its unit is m/s sq. .
Retardation
 The rate of decreasing
of velocity of a moving
object is known as
retardation .
 It is a vector quantity.
Uniform acceleration motion
A kind of motion in which
velocity of an object
increases in equal amount
in equal time interval
is known as uniform
accelerated motion .
Equation of uniformly
accelerated motion
1. V = U + at
2. S = ut + ½ at * t
3. V*V = U*U + 2 as
Uniform circular motion
THANK
YOU .

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Motion class 9 physics

  • 1. KendriyaKendriya vidyalayavidyalaya baranbaran name – shashanK gargname – shashanK garg class – ixclass – ix subject – sciencesubject – science (Physics)(Physics) roll no. – 32roll no. – 32 session – 2018-2019session – 2018-2019
  • 3. There are two states of anThere are two states of an object :-object :- • Rest stateRest state •Motion stateMotion state
  • 4. Rest state If the position of an object is not changing with time , then that object is in rest motion .
  • 5. Motion state If the position of an object changes with time, then that object is in motion state .
  • 6. Scalar Quantities • The physical quantities which requires only magnitude to describe them and there is no need to direction are known as scalar quantities . • Examples :- Distance , speed , time , volume , area , density , temperature , pressure , etc. .
  • 7. Vector Quantities • The quantities which require direction as well as magnitude to describe them are known as Vector Quantities. • Example :- Displacement , velocity , acceleration , force , etc. .
  • 8. Distance  The length of actual path travelled by an object is known as distance covered by the object .  It is a scalar quantity .
  • 9. Displacement  The shortest distance travelled between initial position to final position is known as Displacement .  It is a vector quantity .
  • 10. Speed  Speed of a body is the distance travelled by it per unit time .  Speed = distance travelled time taken  It is a scalar quantity .  Its unit is m/s .
  • 11. Velocity  Velocity of a body is the distance travelled by it per unit time in a given direction.  It is a vector quantity .  Velocity = displacement/time  Its unit is m/sec .
  • 12. Acceleration  The rate of change of velocity of an moving object is known as its Acceleration .  It is a vector quantity .  a = final velocity – initial V. time taken  Its unit is m/s sq. .
  • 13. Retardation  The rate of decreasing of velocity of a moving object is known as retardation .  It is a vector quantity.
  • 14. Uniform acceleration motion A kind of motion in which velocity of an object increases in equal amount in equal time interval is known as uniform accelerated motion .
  • 15. Equation of uniformly accelerated motion 1. V = U + at 2. S = ut + ½ at * t 3. V*V = U*U + 2 as