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MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
PHYSICS
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
MOTION IN A
STRAIGHT LINE
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
MOTION IN A
STRAIGHT LINE
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
WHAT IS A PARTICLE?
WHAT IS A RIGID BODY?
 A “PARTICLE” is an object which has a negligible dimension.
 RIGID BODY: It is a combination of particles and when an
external force is applied there will be no change in its dimensions.
“PARTICLE”
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Are you a PARTICLE
OR
RIGID BODY?
As relative distance is less, you are considered to be a
BODY
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
As relative distance is large,
person appears as a
PARTICLE & RIGID
BODY
RELATIVE TERMS.
i.e
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
REST & MOTION
FAN AT REST…..
WHAT IS REST?
TV AT REST…
 If a body does not change its position with respect to surroundings, then
the body is said to be at rest.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
WHAT IS MOTION?
MOVING BLADES OF A FAN
MOVING CAR
CHANGES THE POSITION WITH RESPECT TO TIME
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
ARE THE PASSENGERS IN THE BUS AT REST OR IN MOTION?
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
 PASSENGERS IN THE BUS ARE AT REST RELATIVE TO
EACH OTHER……
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
 PASSENGERS IN THE BUS ARE IN MOTION RELATIVE TO
PEOPLE AT BUS STOP
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
WHAT IS MOTION?
 Motion is change of position with respect to time.
WHAT IS REST?
 A body is said to be at rest when there is no change of position with
respect to time.
 The branch of mechanics that deals with the study of motion of
objects without any reference to the cause of motion is called
kinematics.
 A system of coordinate axis with respect to which an event can be
described is called frame of reference.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
REST & MOTION ARE RELATIVE TERMS
 Motion of an object is always with respect to some frame of
reference.
One frame of
reference
Another frame of reference
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Let us see how the states of motion and rest are related….
 Rest and motion are relative terms. They are not absolute. A body
can be at rest or in motion with respect to reference frame.
 A man in a moving train is at rest with respect to a co-passenger,
but he is in motion with respect to a man outside the train.
 There is no frame of reference which is perfectly at rest.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
1) A particle is an object having negligible ...
a) units
b)
c) magnitude
d) directions
dimensions
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
2) Rigid body is a combination of particles and when external force is
applied there will be no change in its...
a) magnitude
b)
c) magnitude and direction
d) direction alone
dimensions
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
3) Rest and motion are ___ terms.
a) absolute
b)
c) relative
d) both (b) and (c)
not absolute
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
 CRAWLING ANTS
WHAT TYPE OF
MOTION IS THIS?
THIS IS MOTION IN A
STRAIGHT LINE.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
 COCKROACH MOVING ON A FLOOR
WHAT TYPE OF
MOTION IS IT?
THIS IS MOTION IN
A PLANE.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
 FLYING HONEY BEE
WHAT TYPE OF
MOTION IS IT?
THIS IS MOTION
IN A SPACE.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Motion in one dimension
 Motion in a straight line
Motion in two dimensions
Motion in three dimensions
 Motion in a plane..
 Motion in a space…..
TYPES OF MOTION
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
1. How many types of motions are there?
a) Two
b)
c) Three
d) One
Four
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
2. Motion in one dimension is also called ...
a) motion in space
b)
c) motion in a straight line
d) motion under gravity
motion in a plane
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Recti
Straight
 Motion along a straight line is called
Rectilinear motion
Ex: The motion of a car on a road.
Linear
Line
+
+
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Rectilinear motion need not
be one dimensional
necessarily.
Rectilinear motion can
be any straight line in
any direction
But, it is always
possible that rectilinear
motion be treated as one
dimensional motion
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
1
2
3
4
-4
-3
-2
-1
1 2 3 4
-4 -3 -2 -1
 Rotation of coordinate system does not
change the rectilinear motion of the car.
x
y
rectilinear motion
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
SCALAR QUANTITY
 Quantity with magnitude alone and no direction
 Example: Path length, speed
VECTOR QUANTITY
 Quantity with both magnitude and direction follows laws of vector
addition.
 Example: Displacement, velocity.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
PATH LENGTH AND DISPLACEMENT
Path length: Total distance travelled by an object from initial to final
position.
HOME COLLEGE
Displacement: Shortest distance between initial and final position.
Path length=DHC+DCM
Displacement=DHM
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
PATH LENGTH = DISPLACEMENT
Initial position Final position
Path length = DHM
Displacement = DHM
 Path length = displacement
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Initial position Final position
Path length=DHM+DMH
Displacement=0
Path length≠0
But displacement=0
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
 The magnitude of displacement may or may not be equal to the path
length travelled by an object.
 The magnitude of the displacement for a complete motion may be
zero but the corresponding path length is not zero.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
1. Correct statement among the following is...
1) When displacement is zero, distance travelled is not zero.
2) When displacement is zero, distance travelled is also zero.
3) When distance is zero, displacement is not zero.
4) Distance travelled and displacement are always equal.
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
2. The numerical ratio of displacement to distance is...
1) always less than 1
3) always equal to 1
4) may be less than 1 or equal to 1
2) always greater than 1
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
3. The total distance travelled by an object from initial to final position is
known as ...
a) speed
b)
c) displacement
d) distance
path length
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
If an object is moving along a straight line covers equal distance at
equal intervals of time, however small the time interval may be, it is said
to be in uniform motion along a straight line.
What is uniform motion?
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
SPEED: Rate at which an object covers distance
 Scalar quantity
Speed =
Path length
Time taken
VELOCITY: Rate at which an object changes its position in a given
direction.
 Vector quantity
Velocity =
Displacement
Time taken
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Example: Speed and velocity
Initial position Final position
During total journey
Let DHM = 2km, Time (T) = 1 hr
Path length=DHM+DMH
Displacement = 0
= 2+2 = 4 km
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Speed =
Path length
Time taken
=
4
1
Velocity =
Displacement
Time taken
=
0
1
= 4 km/hr
= 0
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
1. Speed is a ___quantity.
a) scalar
b)
c) neither scalar nor vector
d) both scalar and vector
vector
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
2. Velocity is a ___ quantity
a) scalar
b)
c) neither scalar nor vector
d) both scalar and vector
vector
MOTION IN A STRAIGHT LINE
Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
Thank you…

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JEE Coaching Center In Jalandhar|9463138669-ANAND CLASSES

  • 1. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 PHYSICS
  • 2. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 MOTION IN A STRAIGHT LINE
  • 3. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
  • 4. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 MOTION IN A STRAIGHT LINE
  • 5. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 WHAT IS A PARTICLE? WHAT IS A RIGID BODY?  A “PARTICLE” is an object which has a negligible dimension.  RIGID BODY: It is a combination of particles and when an external force is applied there will be no change in its dimensions. “PARTICLE”
  • 6. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Are you a PARTICLE OR RIGID BODY? As relative distance is less, you are considered to be a BODY
  • 7. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 As relative distance is large, person appears as a PARTICLE & RIGID BODY RELATIVE TERMS. i.e
  • 8. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 REST & MOTION FAN AT REST….. WHAT IS REST? TV AT REST…  If a body does not change its position with respect to surroundings, then the body is said to be at rest.
  • 9. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 WHAT IS MOTION? MOVING BLADES OF A FAN MOVING CAR CHANGES THE POSITION WITH RESPECT TO TIME
  • 10. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 ARE THE PASSENGERS IN THE BUS AT REST OR IN MOTION?
  • 11. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669  PASSENGERS IN THE BUS ARE AT REST RELATIVE TO EACH OTHER……
  • 12. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669  PASSENGERS IN THE BUS ARE IN MOTION RELATIVE TO PEOPLE AT BUS STOP
  • 13. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 WHAT IS MOTION?  Motion is change of position with respect to time. WHAT IS REST?  A body is said to be at rest when there is no change of position with respect to time.  The branch of mechanics that deals with the study of motion of objects without any reference to the cause of motion is called kinematics.  A system of coordinate axis with respect to which an event can be described is called frame of reference.
  • 14. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 REST & MOTION ARE RELATIVE TERMS  Motion of an object is always with respect to some frame of reference. One frame of reference Another frame of reference
  • 15. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Let us see how the states of motion and rest are related….  Rest and motion are relative terms. They are not absolute. A body can be at rest or in motion with respect to reference frame.  A man in a moving train is at rest with respect to a co-passenger, but he is in motion with respect to a man outside the train.  There is no frame of reference which is perfectly at rest.
  • 16. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 1) A particle is an object having negligible ... a) units b) c) magnitude d) directions dimensions
  • 17. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 2) Rigid body is a combination of particles and when external force is applied there will be no change in its... a) magnitude b) c) magnitude and direction d) direction alone dimensions
  • 18. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 3) Rest and motion are ___ terms. a) absolute b) c) relative d) both (b) and (c) not absolute
  • 19. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
  • 20. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669  CRAWLING ANTS WHAT TYPE OF MOTION IS THIS? THIS IS MOTION IN A STRAIGHT LINE.
  • 21. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669  COCKROACH MOVING ON A FLOOR WHAT TYPE OF MOTION IS IT? THIS IS MOTION IN A PLANE.
  • 22. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669  FLYING HONEY BEE WHAT TYPE OF MOTION IS IT? THIS IS MOTION IN A SPACE.
  • 23. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Motion in one dimension  Motion in a straight line Motion in two dimensions Motion in three dimensions  Motion in a plane..  Motion in a space….. TYPES OF MOTION
  • 24. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 1. How many types of motions are there? a) Two b) c) Three d) One Four
  • 25. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 2. Motion in one dimension is also called ... a) motion in space b) c) motion in a straight line d) motion under gravity motion in a plane
  • 26. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
  • 27. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Recti Straight  Motion along a straight line is called Rectilinear motion Ex: The motion of a car on a road. Linear Line + +
  • 28. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Rectilinear motion need not be one dimensional necessarily. Rectilinear motion can be any straight line in any direction But, it is always possible that rectilinear motion be treated as one dimensional motion
  • 29. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 1 2 3 4 -4 -3 -2 -1 1 2 3 4 -4 -3 -2 -1  Rotation of coordinate system does not change the rectilinear motion of the car. x y rectilinear motion
  • 30. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 SCALAR QUANTITY  Quantity with magnitude alone and no direction  Example: Path length, speed VECTOR QUANTITY  Quantity with both magnitude and direction follows laws of vector addition.  Example: Displacement, velocity.
  • 31. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 PATH LENGTH AND DISPLACEMENT Path length: Total distance travelled by an object from initial to final position. HOME COLLEGE Displacement: Shortest distance between initial and final position. Path length=DHC+DCM Displacement=DHM
  • 32. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 PATH LENGTH = DISPLACEMENT Initial position Final position Path length = DHM Displacement = DHM  Path length = displacement
  • 33. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Initial position Final position Path length=DHM+DMH Displacement=0 Path length≠0 But displacement=0
  • 34. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669  The magnitude of displacement may or may not be equal to the path length travelled by an object.  The magnitude of the displacement for a complete motion may be zero but the corresponding path length is not zero.
  • 35. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 1. Correct statement among the following is... 1) When displacement is zero, distance travelled is not zero. 2) When displacement is zero, distance travelled is also zero. 3) When distance is zero, displacement is not zero. 4) Distance travelled and displacement are always equal.
  • 36. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 2. The numerical ratio of displacement to distance is... 1) always less than 1 3) always equal to 1 4) may be less than 1 or equal to 1 2) always greater than 1
  • 37. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 3. The total distance travelled by an object from initial to final position is known as ... a) speed b) c) displacement d) distance path length
  • 38. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669
  • 39. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 If an object is moving along a straight line covers equal distance at equal intervals of time, however small the time interval may be, it is said to be in uniform motion along a straight line. What is uniform motion?
  • 40. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 SPEED: Rate at which an object covers distance  Scalar quantity Speed = Path length Time taken VELOCITY: Rate at which an object changes its position in a given direction.  Vector quantity Velocity = Displacement Time taken
  • 41. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Example: Speed and velocity Initial position Final position During total journey Let DHM = 2km, Time (T) = 1 hr Path length=DHM+DMH Displacement = 0 = 2+2 = 4 km
  • 42. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Speed = Path length Time taken = 4 1 Velocity = Displacement Time taken = 0 1 = 4 km/hr = 0
  • 43. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 1. Speed is a ___quantity. a) scalar b) c) neither scalar nor vector d) both scalar and vector vector
  • 44. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 2. Velocity is a ___ quantity a) scalar b) c) neither scalar nor vector d) both scalar and vector vector
  • 45. MOTION IN A STRAIGHT LINE Copyright : ANAND CLASSES NEERAJ K ANAND PARAM ANAND anandclasses.co.in Ph : 9463138669 Thank you…