1. Energy Pie Charts

2. Constant Velocity Motion
The Toy Car Lab
Constant Velocity Motion

3. Example 2 Toy Car Lab 1 2 3
Is the system isolated?
Yes, there are no external forces!
System = Toy Car, Table, Earth
System = Toy Car, Table
System =
System = Toy Car
Since the system is isolated, energy is conserved. 1 2 3

5. The Ball Rolling Down an Incline Lab Uniformly Accelerated Motion

6. Example 2 Ball Rolling Down an Incline
System = Ball, Incline
System = Ball, Incline, Earth
System =
System = Ball 1
Friction = No
Friction = ? 2 3
Is the system isolated? 4
Yes, there are no external forces!

7. Example 2 Ball Rolling Down an Incline
System = Ball
System = Ball, Earth, Incline
System =
System = Ball, Earth 1
Friction = No
Friction = ? 2 3
Since the system is isolated, energy is conserved. 4 1 2 3 4

8. The Pendulum Lab

9. Example 3 The Pendulum Lab 15
How can we tell from the diagram if energy is dissipated? 2 4
Position 5 is lower than position 1! 3
System = Pendulum Bob, String, Clamp, Earth
System =
System = Pendulum Bob
System = Pendulum Bob, String, Clamp
System = Pendulum Bob, String

10. Example 3 The Pendulum Lab1 5
Is the system isolated?
Yes, there are no external forces! 2 4 3
Since the system is isolated, energy is conserved.
System = Pendulum Bob, String, Clamp, Earth 1 2 3 4 5

11. Example 3 The Pendulum Lab1 5 2 4 3
System = Pendulum Bob, String, Clamp, Earth 1 2 3 4 5