This document provides learning objectives and content about forces and motion. It begins with defining key terms like force, contact forces, non-contact forces, balanced and unbalanced forces, and net force. It then discusses the three laws of motion according to Sir Isaac Newton, including the law of inertia, the law of acceleration, and the law of interaction. Examples are given for each law. The document concludes with a performance task asking students to demonstrate examples of the three laws of motion in everyday life.

1. Force
Science 8

2. 01
Learning
Objectives
Table of contents
02 Process Questions
03 Definition and
Description of Force
04
Contact and Non
Contact Forces
05
Balanced and
Unbalanced Forces
06 Net Force
Activity

3. Learning Objectives
At the end of this lesson, students will be able to:
1. Define, describe and demonstrate FORCE.
2. Differentiate contact force to non-contact force, balanced force
from unbalanced force,
3. Understand how to compute the value of net force;

4. Processed Question:
Why do forces always come
in pairs?

5. WHAT IS

6. is defined as
push and pull
acting upon an
object as a result
of its interaction
with another
object.
Force

7. How do we describe force?
1. It can make an object move or stop.
2. It produces changes in motion.
3. It can make an object change its shape and size.
4. It acts on objects.

8. How do we describe force?
5. Expressed in NEWTON (N);
6. It is a vector quantity: magnitude and direction.

9. TYPES OF FORCES
1. Contact
Forces
2. Non - Contact
Forces
- Interacting
objects are
directly
touching.
- Interacting
objects are
not directly
touching.

10. CONTACT FORCES
● Applied Force
● Frictional
Force
● Spring
Force
● Tension
Force

11. CONTACT FORCES
● Normal
Force

12. Non - Contact Forces
Magnetic
Force
Electrostatic
Force
Gravitational
Force

13. Balanced Force and
Unbalanced Force
•A stationary object will not move while the forces acting on
it are balanced, equal or zero.
•A stationary object will move if the forces acted upon is
unbalanced.

15. NET FORCE
- when two or more
forces are combined

17. Formula: 𝑭𝒏𝒆𝒕= 𝑭1 + 𝑭2
Solution:
= 1050 N + 359 N
= 1409 N to the right or
= 1409 to the east or
= 1409 N

18. Formula: 𝑭𝒏𝒆𝒕= 𝑭1 - 𝑭2
Solution:
=955 N - 560 N
= 395 N to the right or
= 395 N to the east
or
= 395 N

19. Take note that:
1. Forces in the same direction, ADD the two forces
together and follow the direction.
2. Forces in different directions, SUBTRACT the two and figure
out which direction was the stronger of the two.

21. Motion
Science 8

22. 01
Learning
Objectives
Table of contents
02 Process Questions
03 Definition of Motion
04
Proponent of the 3
Laws of Motion
05
The Three Laws of
Motion
06 Activity

23. Learning Objectives
At the end of this lesson, students will be able to:
1. Define, describe and demonstrate MOTION.
2. Understand and analyze the significance of the Three Laws of
Motion in everyday activities.
3. Present simple activities that shows the Three Laws of Motion.

24. If force is applied in an
object, will motion always
occur?
Processed Question:

25. What is

26. Motion
- defined as change of position over
time, when we apply force.
How do we know if something has
moved?

27. How do we know if something has
moved?
- A reference point, is an indication in
change of position of an object.

28. Example:

29. Sir Isaac
Newton
was an English
mathematician, physicist,
astronomer and author
who is widely recognized
as one of the most
influential scientists of all
time

30. What are the Three Laws of Motion?
Law of Inertia
Law of Acceleration
Law of Interaction

31. Law of Inertia
An object at rest stays at rest and
an object in motion stays in motion
with the same speed and in the same
direction unless acted upon by an
unbalanced force.

33. One of the most common places people feel the First Law
of Motion is in a fast moving vehicle, such as a car or a
bus, that suddenly stopped. An outside force stops the
vehicle, but the passengers, who have been moving at a
high speed, are not stopped and continue moving at the
same speed.

34. INERTIA
tendency of a body to stay at rest when it is at
rest or stay in uniform motion when it is in motion
unless acted upon by an external force.
MASS is related to the inertia of an object.
The higher the mass the greater the INERTIA
The lower the mass the lesser the INERTIA

35. Law of Acceleration
Force = mass x acceleration
says that acceleration (gaining speed) happens
when a force acts on a mass (object).
The greater the mass (of the object being
accelerated) the greater the amount of force
needed (to accelerate the object). What does this
mean?

36. Which has a higher acceleration?

37. Riding a bicycle is a good example of this law of motion
at work. ... When you push on the pedals, your bicycle
accelerates. You are increasing the speed of the bicycle
by applying force to the pedals.

38. Law of Interaction
For every action
there is an equal
or opposite
reaction.

39. Performance Task
Show everyday life activities that exhibits
Three Laws of Motion. Demonstrate at
least 3 for each law. 30pts

40. Rubrics
10pts 5pts 3pts Total
Accuracy of
Movements
Able to
demonstrate all
correctly and
accordingly
Able to
demonstrate
but with 1-2
errors
Able to
demonstrate
with more than
3 errors
Teamwork All present
members
participated and
contributed
1-2 present
members didn’t
participate
Most of the
members did
not participate
Presentation of
Performance
Group was able
to present
confidently well
Group was able
to present but
with delay
Group
presented but
with confusion

41. Uniform Circular
Motion

42. A circular motion is the movement of an object along
a circular route. Uniform Circular Motion refers to the
motion of a body travelling at a constant speed
across a circular route.

43. Centripetal Force - a net force that acts on an
object to keep it moving along a circular path.

44. Centrifugal Force - the tendency of an object moving
in a circle to travel away from the center of the circle.

45. Applications of Uniform
Circular Motion
a. Planets
orbiting
the sun

46. Applications of Uniform
Circular Motion
B. Swing
Carousel and
Ferris wheel