Introductory Lesson to Balanced and Unbalanced Forces for junior High School Physics. PPT file is also available. Make force concepts come alive in your classroom with this engaging, interactive presentation on Balanced and Unbalanced Forces! Designed for easy instruction and active learning, this lesson includes clear explanations, visual examples, and built-in questions and activities to keep students thinking critically. 🎯 What’s Included: 1. Student-friendly slides explaining balanced vs. unbalanced forces 2. Real-world examples and visuals 3. Interactive questions to check understanding 4. Built-in activities to promote class discussion and engagement 5. Ready to use – perfect for in-person or virtual lessons 6. Customizable and downloadable

1. BALANCED AND UNBALANCED FORCES
Learn with Ms. Mae

2. INTENDED LAERNINNG
OUTCOMES
Describe balanced and unbalanced forces
Cite examples of balanced and unbalanced
forces in daily life

3. AM I BALANCED OR UNBALANCED TODAY?
BALANCED - being in a state of balance : having different parts or elements
properly or effectively arranged, proportioned, and etc.
UNABALANCED - not balanced: such as, not in equilibrium, mentally disordered,
unorganized

4. CLASS FLOW
1.Prayer
2.Science Updates
3.True or False
4.Discussion
5.HBU Activity
6.Quick check!

5. WHAT ARE FORCES?
Forces are pushes or pulls acting on an object
They can be balanced or unbalanced
Today we'll explore the difference through an experiment
What do you think happens when forces are balanced vs. unbalanced?

6. PRIOR LEARNING QUIZ
NUMBER STATEMENT TRUE OR FALSE
1. Gravity pulls objects toward the Earth.
2. Air resistance affects falling objects.
3. The mass of an object changes based on its location.
4. Objects move without being touched.

7. PRIOR LEARNING QUIZ
NUMBER STATEMENT TRUE OR FALSE
1. Gravity pulls objects toward the Earth. True
2. Air resistance affects falling objects. True
3. The mass of an object changes based on its location. False
4. Objects move without being touched. False

8. INTRODUCTION
Forces play an important role in our daily
lives. They can be balanced or
unbalanced.
Understanding these forces helps us
explain and predict motion.
For example, engineers use this knowledge
to design safe bridges and vehicles.

9. BALANCED FORCES
Balanced forces are equal in size
and act in opposite directions.
They do not change an object's
motion.
How to tell that an object has
balanced force:
stationary acted upon by opposite
forces
moving with equal force
The force of gravity pulling the book
down is balanced by the table
pushing up.

10. BALANCE THROUGH CARDS
Choose 3 students to create a
stack of cards that would show
balanced forces.
The rest must explain how did the
stack illustrate a balanced force.

11. HBU?
What are some balanced force
that you can think of?
Write down your answers on your
Science Notebooks
The force of gravity pulling the book
down is balanced by the table
pushing up.

12. UNBALANCED FORCES
Unbalanced forces are not equal and
cause a change in motion.
How to tell that an object is
unbalanced:
Accelerating or decelerating
Moving with unbalanced forces
Pushing a box: The force applied by
your hand is greater than the friction
force.

13. UNBALANCE THROUGH
CARDS
Choose 1 student to exert more
pushing force to the cards
The rest must explain how did the
event illustrate an unbalanced
force.

14. TERMINAL VELOCITY
A skydiver experiences balanced
forces when reaching terminal
velocity.
Terminal velocity is the steady speed
you reach when the force pulling you
down (gravity) is balanced by the
force pushing you up (air resistance).
It's the fastest speed you can fall
without speeding up anymore!
Gravity pulls the skydiver down, air
resistance pushes up with equal
force, resulting in no acceleration.

15. HBU ?
What are some unbalanced forces
that you can think of?
On our Science notebooks write
down as many unbalanced force as
you can.

16. ACCELERATING VEHICLE
An accelerating van has unbalanced forces
acting on it.
Calculation:
Driving force: 3000 N
Friction force: 1000 N
Resultant force: 3000 N - 1000 N = 2000 N The driving force forward is greater
than the friction force, causing
acceleration.
3000 N 1000 N

17. CAR AT A STEADY SPEED
A car moving at a steady speed has balanced
forces.
The driving force is equal to the
friction force, resulting in no
acceleration.
3000 N 3000 N

18. QUICK CHECK
1. A car parked on a flat road with the engine off.
2. A child pushing a stationary swing, causing it to
move back and forth.
3. A book resting on a table, not moving.
4. A soccer ball rolling towards a goal after being
kicked.
5. Two people pushing against each other with
equal force.

19. THINGS TO REMEMBER REFLECTION QUESTIONS
Balanced forces result in no change
in motion
Unbalanced forces cause changes in
motion.
How might understanding these concepts
help in designing safer vehicles or
buildings?
What other experiments could we do to
further explore forces?

20. EXIT TICKET
1. Which of the following best describes balanced forces?
a) Forces that are equal in size but in the same direction
b) Forces that are unequal in size and in opposite directions
c) Forces that are equal in size and in opposite directions
d) Forces that result in a change in motion

21. EXIT TICKET
2. What is the primary effect of unbalanced forces on an object?
a) They cause the object to remain stationary
b) They result in a change in the object's motion
c) They always cause the object to accelerate
d) They have no effect on the object

22. EXIT TICKET
3. How does the concept of balanced forces apply to a book resting on a table
a) The book exerts a force downward, and the table exerts an equal force upward
b) The book exerts no force, and the table pushes upward
c) The book pushes down harder than the table pushes up
d) There are no forces acting on the book

23. EXIT TICKET
4. Which scenario best demonstrates unbalanced forces in action?
a) A person standing still on the ground
b) A book sliding off a tilted table
c) Two people arm wrestling with neither winning
d) A balloon floating motionless in still air

24. EXIT TICKET
5. How might understanding balanced and unbalanced forces contribute to vehicle safety design?
a) By making cars heavier to increase their inertia
b) By designing crumple zones to manage unbalanced forces during collisions
c) By eliminating all forces acting on the vehicle
d) By ensuring all forces on the vehicle are always balanced

25. EXIT TICKET
5. How might understanding balanced and unbalanced forces contribute to vehicle safety design?
a) By making cars heavier to increase their inertia
b) By designing crumple zones to manage unbalanced forces during collisions
c) By eliminating all forces acting on the vehicle
d) By ensuring all forces on the vehicle are always balanced

26. ILO CHECK!
Describe balanced and unbalanced forces
Cite examples of balanced and unbalanced
forces in daily life