1. Matter and Energy Section 3.1: Energy exists in different forms

2. Energy causes _____!
Change

3. Kinetic Energy
The energy of __________.
Motion

4. Kinetic Energy Which item has more energy? How do you know?
The Truck! Why? Because kinetic energy increases as _________ increases!
mass

5. Kinetic Energy SPEED KINETIC ENERGY
Kinetic energy _____________ as speed increases.
increases
SPEED
KINETIC ENERGY

6. Kinetic Energy Formula: KE = ½ mv2 KE = Kinetic Energy m = mass
v = velocity
Example:
Mass of truck = 12 kg
Velocity = 4 m/s
Solve:
(1/2) (12 kg) (4 m/s)2
(1/2) (12 kg) (16m2/s2)
(6 kg) (16 m2/s2)
KE = 96 J

7. Kinetic Energy Formula: KE = ½ mv2 (1/2) (8 kg) (2 m/s)2
Data:
mass = 8 kg
velocity = 2 m/s
(1/2) (8 kg) (2 m/s)2
(1/2) (8 kg) (4 m2/s2)
(4 kg) (4 m2/s2)
KE = 16 J

8. Potential Energy
____________ energy that an object has.
Stored

9. Potential Energy Potential Energy exists due to its ____________.
position
HIGHEST POINT OF POTENTIAL ENERGY
Gravity affects the position of the swing.

10. Potential Energy
Gravity will pull the bike down the hill. Therefore, its position creates potential energy.

11. Potential Energy Which item has potential energy due to its position?
Potential energy can come from stretching.

12. Potential Energy
The potential energy decreases when the spring is released.
More potential energy due to the spring’s compression.

13. Potential Energy
Potential Energy exists due to chemical composition.

14. Potential Energy GPE = mgh Example: (5 kg)(9.81 m/s2)(25 m)
GPE = gravitational potential energy
m = mass
g = gravity
h = height
Gravity on earth is always 9.81 m/s2
Example:
Mass = 5 kg
Height = 25 m
(5 kg)(9.81 m/s2)(25 m)
GPE = J

15. Potential Energy GPE = mgh Example: (18 kg) (9.81 m/s2) (5 m)
Mass = 18 kg
Height = 5 m
Gravity = 9.81 m/s2
(18 kg) (9.81 m/s2) (5 m)
GPE = J

16. Types of Energy Mechanical Energy: The energy that moves________.
objects

17. Types of Energy Sound Energy Energy created from_________.
Sound results from the ___________ of particles in a solid, liquid, or gas.
Sound cannot travel through _____________.
sound
vibration
empty space

18. Types of Energy Chemical Energy
Energy that is stored from the ___________ composition of matter.
Example: burning wood is chemical energy
chemical

19. Types of Energy GAS Thermal Energy
The total amount of energy from the movement of particles in ___________.
The more they move the more energy they create. Therefore, which state of matter would create more thermal energy?
matter
GAS

20. Types of Energy Electromagnetic Energy
Transferred through _____________.
Examples:
visible light…
empty space

21. Types of Energy Nuclear Energy nucleusH E A T
Nuclear Energy
Comes from the __________ of an atom.
When the atom’s nucleus breaks apart energy is released.
nucleus

22. Types of Energy Electrical Energy
energy made available by the flow of electric charges through a conductor.

23. What type of energy am I?