The presentation shows how energies transformed from 1 form to another.

2. Attendance Checking
Answer the
google form link
provided in the
chatbox.

3. Mute yourself
If you’re not going to
recite.
Be respectful
To your teacher and
classmates
Raise your hand
If you want to answer or say
something related to our
topic.
Find a quiet place
To avoid disruptions
Come prepared
Make sure you advance
study the lesson
Classroom Rules and Regulations

4. Looking back
Choices:
Potential Energy KE = ½ mv2 Joules
Kinetic Energy PE = mgh Newtons
Kinetic Energy Potential Energy
KE= 1/2 mv2 PE = mgh
Joules (J)

5. Law of serConvation fo
Mechacalni gyEner

6. Quarter 4 – Week 4
Law of Conservation
of Mechanical Energy
MELCS: Analyze the conservation of potential
energy to kinetic energy and vice versa to given
situations.

7. Objectives:
At the end of the session,
students should be able to:
 State the law of
conservation of
mechanical energy;
 Differentiate potential
from kinetic energy
 Reflect that our life is a
like a roller coaster ride.

8. is a form of
energy that is
possessed by an
object due to its
motion or due to
its position
Energy Mechanical
energy
Law of
conservation
of energy
states that energy
can neither be
created nor
destroyed - only
converted from one
form of energy to
another.
is the ability to
do work
1
1 2 3
2 3
Unlocking of Difficulties: Perfect Match

9. Activity: Scott the skater
Help Scott the skater to analyze the conversion of
potential energy to kinetic energy and vice versa.
Objective:

10. Scott the Skater
Objective: Analyze the conversion of potential to kinetic energy
and vice versa using Phet simulation
Help Scott to describe the
conversion of potential to
kinetic energy and vice versa.
Observe his movement where
the transformation of kinetic
and potential energy occurs
using the Phet simulation.

11. Procedure for the Phet Simulation
• Observe the movement of the Scott the skater
along the curve line.
• On the left side of the Phet application,you
can observe the activity of the potential and
kinetic energy of the skater boy along the
curve line. Answer the guide questions.
• Describe the activity of the potential and
kinetic energy as Zero, maximum, increasing
and decreasing using the worksheet given by
the teacher.

15. Direction: Encircle the status of PE and KE at different points of Scott
the skater.

16. Processing of
the Activity

17. Guide Questions:
1. In what point of the ramp does the
potential energy in maximum?
2. What is the kinetic energy at the
highest point?

18. Guide Questions:
3. What happened to the kinetic and
potential energy at the lowest point of
the ramp?
4. What happened to the potential
energy of the skater as it goes up?

19. Guide Questions:
5. What happened to the kinetic
energy of the skater as it goes up?
6. What happened to the total
Mechanical Energy as the skater
moves from different points?

20. Direction: Encircle the status of PE and KE at different points of Scott
the skater.

21. Big Idea:
• Law of conservation of mechanical energy states
that, for a closed system, in the absence of
dissipative force, the total energy of the system will
remain constant.
• Energy is neither created nor destroyed, only
converted to one form to another.
• Mechanical energy is composed of potential and
kinetic energy. Kinetic energy is the energy in
motion while potential energy is the stored
energy in an object.

22. Applications of Law of Conservation Mechanical Energy

23. VALUING:

24. Generalization:
Direction: Fill in the blanks with the appropriate word to complete the statement. Choose
from the box.
Law of conservation of mechanical energy states that, for a closed system,
in the absence of dissipative force, the total energy of the system will
remain ___________. Energy is neither ____________nor __________, only
converted to one form to another. Mechanical energy is composed of
potential and kinetic energy. _______________is the energy in motion while
______________is the stored energy in an object.
constant created destroyed
Kinetic energy
potential energy

25. Objectives:
At the end of the session,
students should be able to:
 State the law of
conservation of
mechanical energy;
 Differentiate potential
from kinetic energy
 Reflect that our life is a
like a roller coaster ride.

26. Assessment: Roller Coaster
Ride!
Direction: Analyze the picture below. Choose the correct letter that
applies to the corresponding number. Choices can be used more than
once.
1
2
3
4
5
A
B
D
C
A

27. Proficiency Chart!
Section: 9-26 and 9-27
Total Enrollment: 114
Total Attendance:
Target Score: 3/5
# of students passed
% of students
passed