powerpooint presentation about forces and motion

1. WELCOME BACK
TO SCHOOL!!!

2. OPENING
PRAYER

3. QUARTER-1
WEEK-1
Changes in the Motion
of Objects

4. MELC
“Investigate the relationship
between the amount of force
applied and the mass of the object
to the amount of change in the
object’s motion”

5. OBJECTIVES:
1. Differentiate the three laws of Motion.
2. Solve problems using the GRESA method
based from the second law of motion.
3. Identify the situation as, First law of
motion, second law of motion, third of
motion.

6. Choose the letter of the correct answer.
Write your answers on a separate sheet
of paper.
1.Who formulated the Three Laws of Motion?
a. Aristotle c.Thomas Edison
b. Isaac Newton d. Alexander Graham
Bell
What I Know?

7. 2. Which has more mass, a kilogram of
cotton or a kilogram of iron?
a. iron
b. cotton
c. both have the same mass
d. cannot be determined from
the given information

8. 3. Which has the greatest inertia?
a. airplane b. car
c. jeepney d. Bike
4. Which of these vehicles moving at the
same velocity is difficult to stop?
a. bus b. car

9. Motion – is a phenomenon in
which object changes its
position over time .
Motion is described in terms
of displacement, distance,
velocity, acceleration speed &
time.

10. �Distance – refers to the
length of entire path that the
objects travelled.
�Displacement – refers to the
shortest distance between
the object’s two position,
like the distance between
its point of origin and its
point of destination.

12. In the previous illustration, the train is
moving from its reference point of its
place of origin. The train moves with
certain speed, at a rate by which it
accelerates at specific time. With regards
to the man, there is no motion as there is
no change in his position nor
displacement.

13. Prepared by:
Marissa A. Fontanil
SST-III

14. It All Starts with a Ruler!!!
9/3/2023
14

15. Standard unit-is the most
commonly used unit of
measurement. these units are
standardized, meaning that
everyone has the same
understanding of the size,
weight, and other properties of
an object.
15

16. International System of Units (SI)
is more commonly referred to as the Metric System.
This is the international system for measuring
objects. Scientists and other professionals use the SI
System of Measurement to make measurements and
observations because it is the universal language of
measurement and is understood by others as a
uniform measurement system.
9/3/2023
16

18. 18

19. SI Unit Prefixes- Part II
19

20. 20

22. KILO
1000 HECTO
Units 100
Units
DEKA
10
Units
DECI
0.1
Unit
CENTI
0.01
Unit
MILLI
0.001
Unit
1. Meters
2. Liters
3. Grams
Ladder Method
1
2
3

23. Ladder Method
4 km = m
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of
jumps in the same direction.
Start End
How many jumps does it take?
King Henry Died ** Drinking Chocolate Milk

24. 160 cm = mm
Try these conversions using the ladder method.
1000 mg = g 1 L = mL
14 km = m 109 g = kg 250 m = km
Conversion Practice
Compare using <, >, or =.
56 cm 6 m
7 g 698 mg

26. km
m
g
mL
mm
L
km
cm
mg
2
104,000
4.80
5600
0.8
5000
0.198
0.075
0.50
560
160
2.5
65000
63
0.120
< > =
= < >

28. 10
3000
6
9000
8000
1000
7000
2000
4
5

29. 5. All of the following apply the third law of
motion EXCEPT ____________.
a. kicking a ball
b. rowing a banca
c. throwing a stone
d. taking out ketchup from a bottle

30. 5. Which of the following statements are
true?
I. Action and reaction forces occur in pair.
II. Action and reaction forces act on the same
object.
III. Action and reaction forces can occur one
at a time.
IV. Action and reaction forces have the same
magnitude.
a. I and II b. I and IV
c. II and III d. II and IV

31. 7. Which Newton's law explains when a man is
pushed forward in the car as it stops.
a. 1st law b. 2nd law
c. 3rd law d. 2nd and 3rd laws
8. In Newton’s first law of motion, a moving object
that is not acted upon by a net force will
a. accelerate b. change its velocity
c. eventually come to a stop
d. continue moving at constant velocity

32. 9. A boy jumps out of the boat into a dock.
As the boy moves forward to the dock, the
boat moves backward. Which statement
describes this situation?

33. a. An object at rest remains at rest.
b. Friction opposes the motion of an object.
c. For every action, there is an equal and
opposite reaction.
d. The net force is directly proportional to
mass and inversely proportional to
acceleration.

34. 10. Two balls are simultaneously applied with a
force of 20 N. One ball has a mass of 0.3 kg
and the other has 0.4 kg. Which ball has
greater acceleration?
a. They will both accelerate at the same rate.
b. None of them will accelerate greater than the
other.
c. The one with a mass of 0.3 kg has the
greater acceleration.
d. The one with a mass of 0.4 kg has the
greater acceleration.

35. What is force?

36. Forces
If you roll a ball, what happens eventually?

37. Forces
If you roll a ball, what happens eventually?

38. Forces
If you roll a ball, what happens eventually?

39. Effects of force when applied to the
objects
1. Force can make the objects move.
2. Force can move the objects faster.

40. 3. Force can stop the object’s motion.
4. Force can change the direction of
motion.

41. Forces
● Forces have size and direction and are
expressed in Newtons (N)
● Force is always exerted by one object on
another object
● Balanced forces produce no change in
motion
● Unbalanced forces produce a change in

42. Forces
If you roll or kick a ball, what happens
eventually?
An unbalanced force is needed to
change the speed of a moving object.
So, what force is stopping the ball?

43. The Three Laws of Motion

44. Si Isaac Newton - formulated the
laws of motion.
1. Law of Inertia
2. Law of Acceleration
3. Law of Action- Reaction/
Law of Interaction

45. What will happen
to the man riding
in a bus , when
suddenly the driver
stepped on the
brake?

46. Law of Inertia or the
Newton’s First Law of Motion.
> states that a body at rest
remains at rest or, in motion,it
remains in motion at constant
velocity unless acted on by
external force.
L

47. Inertia is a property of an
object to resist any change in its
state of motion.
A more massive object which
has more inertia is very difficult to
move from rest, slows down, speed
up or change its direction.

49. The picture shows that the objects are at
rest, how will you make it move?
Picture A
Picture B
Picture C

50. Types of Inertia:
1. Inertia of motion - an object will
continue at the same speed until a force
acts on it.
2.Inertia at Rest - an object stays where
it is placed , and will stay there until you
or something else move it.
3.Inertia of Direction - an object will
stay moving in the same direction unless a
force acts on it.

51. Isaac Newton
explained this
relationship between
force and the motion
of an object.

52. What happens when riding bumper
cars? Why?

53. Law of Inertia
Inertia is the tendency of
an object to resist being
moved or, if the object is
moving, to resist a change
in speed or direction until
an outside force acts on
the object.

54. Law of Inertia
● Because of Inertia, an
object at rest will stay at
rest unless acted on by an
unbalanced force.

55. Law of Inertia

56. Law of Inertia
● An object in motion
remains in motion unless
acted on by an unbalanced force.
● The object will continue to move
in the same direction with the
same speed unless an unbalanced
force occurs.

58. Mass and Inertia
● Mass is a measure of Inertia
● An object that has a small mass has less
inertia than an object that has a large mass
● So, changing the motion of an object that
has a small mass is easier than changing the
motion of an object that has a large mass.

59. Mass and Inertia
Look at the images below. Which would require
more force to move or slow down? Why?
The car because it has more mass
therefore more inertia.

60. Mass and Inertia
Which would require more force to move or
slow down? Why?
The bowling ball because it has more
mass therefore more inertia.

61. The snowboard is in motion. Based on the Law of Inertia,
the snowboard will keep moving right?
What force(s) allow him to snowboard on the brick wall and
rail?

62. Friction and the Law of Inertia
Objects in motion remain in motion unless
acted on by an unbalanced force. Friction
is often the unbalanced force that
causes objects to slow down and stop
moving.
Because of friction, the motion of objects

63. Newton’s First Law of
Motion: Inertia

64. Law of Acceleration: Newton’s
Second Law of Motion.
>states that, the acceleration of an
object as produced by a net force is
directly proportional to the magnitude of
the net force in the same direction as
the net force and inversely proportional
to the mass of the object.

65. The second law of motion states
that the acceleration of object
dependent up- on two variables:
a.The net force acting upon
on the object;
b.The mass of the object.

66. Small acceleration
Large Mass
F a
Large
acceleration
Small MASS
( F)

68. Law of Action and Reaction:
Newton’s Third Law of Motion.
> To every action, there is
always an equal but opposite reaction.
According to this law, the action is
always accompanied by the reaction
force and the two forces
must be equal and opposite.

69. Picture below shows the action and
reaction force known as Law of Action and
Reaction.

70. Picture B Picture C

71. Terms to Remember:

72. Tell whether the following situations,
are the law of inertia, law of
acceleration or a law of action-reaction
(Interaction).
1.When you are jumping
2. Using the same force in pushing a
truck and a car with the same amount
of force.

73. 3 . Pulling an empty shopping cart and
a full shopping cart with the same amount
of force exerted.
4. During summer while you are flying a
kite.
5. If you slide a hockey puck on ice.
6. If you are riding in a car with a very
high speed and hit the barrier.

74. 7. Table resting in a classroom.
8. The carpenter hammer the nail
into the wood.
9. The players playing baseball.
10. Carrying a sack of rice with less
force.

75. Symbols and Unit of the ff.
quantities:
1. Force (F) unit is Newton ( N )
2. Acceleration (a) unit is m/s2
3.Mass (m) unit is (kg or g)

76. �Force is measured by multiplying the
mass of an object to its acceleration.
� The formula is written as:
� F = m x a
� where; f = force;
� m = mass;
� a = acceleration

77. Derivation of formula using the
triangle method:
F = m x a
m= F/a
a = F/m

78. Units to express the mass, force
and acceleration:
● Force = N
● Acceleration = m/s2
● Mass = kg

79. Example No. 1
*What is the mass
of the cart with
constant net force of
200N is exerted to
accelerate from rest
with a velocity of
40m/s in 10s?
Given:
F = 200N
Vf = 40m/s; Vi= 0m/s
T = 10s
Required:
Acceleration = ?
Mass = ?

80. Equation:
m = f_
a
1N= 1kg/m/s2 (Note)
Solution:
m= 200 kg/m/s2
4m/s2
m= 50kg
Answer = 50kg
Solution:
a = Vf - Vi
T
a = 40m/s - 0m/s
10s
a = 40m/s
10s
a = 4m/s2 or 4m/s/s

81. Example no. 2
What is the acceleration of a ball with a
mass of 0.40kg is hit with a force of 16N?
Given: Equation: Answer:
m = 0.40kg a = f/m a= 40m/s2
F = 16N Solution :
Required: a = 16kg/m/s2 = 16m/s2
a = ? 0.40kg 0.40