1. Energy

2. What happens when an archer draws back on a bowstring?
Energy
What happens when an archer draws back on a bowstring?

3. What happens when a spring is wound to run a clock?
Energy
What happens when a spring is wound to run a clock?

4. Energy
In each of those scenarios “something” has been acquired that enables an object to do work.

5. What is that “something” that is acquired?
Energy
What is that “something” that is acquired?

6. Energy

7. Energy Energy is the ability to do work.
Any object that has Energy has the ability to create force.

8. Energy The workings of the universe (including all of our technology)
can be viewed from the perspective of energy flowing from one place to another and changing back and forth from one form to another.

9. Energy is measured in joules

10. Energy There are 5 main forms of energy 1. Mechanical energy
2. Heat energy
3. Chemical energy
4. Electromagnetic energy
5. Nuclear energy

11. Energy
The five different forms of energy can be classified into either one of the two states:
• Potential Energy- stored energy
• Kinetic Energy- energy in motion

12. Energy
Mechanical Energy is the energy due to the position of something, or the movement of something.

13. Energy Kinetic Energy -The energy of motion.
-The more an object moves,
the more kinetic energy
it has.

14. Energy Kinetic Energy -The faster an object moves,
the more kinetic energy
it has.

15. Energy Kinetic Energy -The equation for solving for kinetic energy is
KE = ½ mv2

16. What is the KE of a 4 kg mass at 3 m/s? (KE = ½ mv2)

17. Energy Potential Energy -Is the stored energy that a
body possesses because of
its position

18. Energy Potential Energy -Can be chemical energy in
fuels or food. i.e. gasoline
in a car, chemicals in a
battery.

19. Energy Potential Energy -Can also be an elevated
object, when it falls its PE
will become KE

20. Energy Potential Energy -If it can make “something”
happen, It has potential
energy (PE)

21. Energy Potential Energy - Gravitational Potential
Energy (GPE) is the energy that comes from how far an
object is from the surface
of the Earth.

22. Energy Potential Energy The equation for solving GPE is GPE = mgh
where g = 9.8m/s2

23. What is the GPE of a 2 kg block 5 m above the floor? (GPE =mgh)

24. Energy Elastic Potential Energy – Stored energy in an object
that is stretched or
compresses, i.e. spring or
a rubber band

25. Chemical Potential Energy – i.e. gasoline in a car, food you eat

26. The Law of Conservation of Energy states: What?

27. Energy The Law of Conservation of Energy states:
Energy cannot be created or destroyed, energy only gets converted from one form to the other

28. Discussion What happens when you throw a ball up in the air?
Energy
Discussion
What happens when you throw a ball up in the air?

29. Energy

30. Energy is almost always converted into another form of energy.

31. Energy
One of the most common conversion is the changing of potential energy to kinetic energy or the reverse.

32. What does the Law of Conservation of Energy state?

33. Energy
Energy conversions occur without a loss or gain in energy, therefore KE=PE.

34. The total energy never exceeds the starting energy.

35. How does friction play a part in the Conservation of Energy?
Discussion
How does friction play a part in the Conservation of Energy?