1. Conservation of Energy
SPH3U

2. The Law of Conservation of Energy
“For an isolated system, energy can be converted into different forms, but it cannot be created or destroyed.”

3. The Law of Conservation of Energy
“For an isolated system, energy can be converted into different forms, but it cannot be created or destroyed.”
No external force is doing work on the system.

4. The Law of Conservation of Energy
“For an isolated system, energy can be converted into different forms, but it cannot be created or destroyed.”
For example, gravitational potential energy may be converted to kinetic energy.

5. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

6. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

7. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

8. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

9. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

10. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

11. Conservation: Example
A ball is launched at 15 m/s horizontally from a ledge 15 m above the ground. What is the speed of the ball when it lands?

12. Other forms of energy include:
Electromagnetic (light)

13. Other forms of energy include:
Electromagnetic (light)
Electrical
Electric potential

14. Other forms of energy include:
Electromagnetic (light)
Electrical
Electric potential
Chemical potential

15. Other forms of energy include:
Electromagnetic (light)
Electrical
Electric potential
Chemical potential
Elastic potential

16. Other forms of energy include:
Electromagnetic (light)
Electrical
Electric potential
Chemical potential
Elastic potential
Sound

17. Other forms of energy include:
Electromagnetic (light)
Electrical
Electric potential
Chemical potential
Elastic potential
Sound
Thermal

18. Other forms of energy include: Electromagnetic (light) Electrical
Electric potential
Chemical potential
Elastic potential
Sound
Thermal
Specific heat capacity
Temperature change

19. Friction causes kinetic energy to transform into thermal energy
Friction causes kinetic energy to transform into thermal energy. Example: A 20-kg curling rock slides in a straight line for 30 m. The coefficient of kinetic friction is 0.1. How much thermal energy is produced during the slide?

20. Example: A 20-kg curling rock slides in a straight line for 30 m
Example: A 20-kg curling rock slides in a straight line for 30 m. The coefficient of kinetic friction is How much thermal energy is produced during the slide?
Therefore 600 J of thermal energy was produced.