This ppt is intended for those who seek more information about the the topic.

1. Kriza Jane Lusica Endencia

2. OBJECTIVES:
1.Identify and describe the work done of an
object
2.Describe the forms of energy.
3.Explain the law of the conservation of energy.

3. VOCABULARYWORK
ENERGY
POTENTIAL ENERGY
KINETIC ENERGY
LAW OF CONSERVATION OF
ENERGY

4. WORK

6. WORKIT IS THE
MEASUREMENT OF THE
ENERGY USED TO
PERFORM A TASK.

7. EXAMPLES EXPLAINATION
Kicking A Football –When kicking a football, person applies force so that the
ball will change it’s direction.
Throwing A Stone -If you are to throw a stone you need to apply force so that
the stone will move.
Riding A Bicycle -To make the bicycle to move you need to apply force to its
pedal the. Then, as you move you will notice the change of
direction.
A teacher applies a
force to a wall
This is not an example of work. The wall did not move. A
force must cause a displacement in order for work to be
done

8. REMEMBER:
THERE WILL ONLY BE WORK IF THERE IS A FORCE
APPLIED TO AN OBJECT AND A CERTAIN
DISTANCE to know that the object really moves.
Example:
*Note: If you push a certain object it will change its
position; thus the object has work done.

9. 1.1.A IDENTIFY IF THERE IS
WORK DONE:
1.Lifting weights.
2.Moving the box
3.Holding the box
4.Pushing the wall
5.Swinging a golf club

10. WORK FORMULA
WORK = FORCE x DISTANCE
Units: Force (Newton)
Distance (meters)
Work (Joules)

11. 1.1.B. WORD PROBLEMS:
1.An elevator lifts a 210 –N object, 9
meters above the ground. How
much work did the elevator do?
2.How much work is done when a 9.8-
N student climbs a 3 meters ladder?

12. ENERGY

14. ENERGY
IT IS THE ABILITY TO
PERFORM WORK OR TO
CHANGE AN OBJECT.

15. FORMS OF ENERGY
Potential Energy
Kinetic Energy

16. Click the link below:
https://www.youtube.com/watch?v=vl4g7T5gw1M

17. POTENTIAL ENERGY
Is energy that is stored in
the position, or structure
of an object.

18. EXAMPLES:
1.Stretched Rubber bond
2.Coiled spring

19. KINETIC ENERGY
Is the energy of a moving
object.
“Energy in motion”

20. EXAMPLES:
1.Release Of The Rubber Bond
2.Bouncing Ball

21. 1.1.C. IDENTIFY THE FOLLOWING: WRITE KE OR PE ONLY.
1.An archers bow with a string pulled
back
2.Yoyo before its release
3.Rolling Marbles
4.Release Of Yo-yo

22. Click the link below:
https://www.youtube.com/watch?v=1JdvH_8cz-I

23. 1.1.D. What forms of
energy were discussed in
the video? Give at least 3
and explain
each.

27. SOLUTIONS:1. Determine the kinetic energy of a 1000-kg roller coaster car that
is moving with a speed of 20.0 m/s.
2. A car is traveling with a velocity of 40 m/s and has a mass of
1120 kg. The car has _____________ energy. Calculate it.
3. A cinder block is sitting on a platform 20 m high. It weighs 7.9 kg.
The block has _______________ energy. Calculate it.
4. There is a bell at the top of a tower that is 45 m high. The bell
weighs 19 kg. The bell has________________ energy. Calculate
it.

30. LAW OF CONSERVATION OF ENERGY
ENERGY CANNOT BE
CREATED NOR
DESTROYED, IT CAN ONLY
BE TRANSFORMED.

31. Click the link below:
https://www.youtube.com/watch?v=PvnhbxTIHZ8

32. Click the link below: (Click SYSTEM)
https://phet.colorado.edu/sims/html/energy-forms-and-
changes/latest/energy-forms-and-changes_en.html

33. EXAMPLES:
1.Chemical Energy to Electrical
Energy to Light Energy
2.Mechanical Energy to Electrical
Energy

34. The Ice Cream (All food that you eat) gives energy to a
man so that he can ride his bike.
*Note: All the food that you eat is a Chemical Energy.
Mechanical Energy is the Ability to Do Work
Radiant (Solar or Light Energy) gives Energy to the plant to
be able to make their own food through the process of
PHOTOSYNTHESIS.
Another example of a Chemical Energy is a Gasoline or fuel.
The car will have Mechanical Energy because the gasoline or the
fuel allows the car to move.

35. 1.1.E. WRITE WHAT FORMS ENERGY
ARE BEING TRANSFORMED?
1.
2.
3.