Slide 1

Energy Pie Charts1Example 2 Toy Car Lab123System = System = Toy CarSince the system is isolated, energy is conserved.123

Is the system isolated?Yes, there are no external forces!System = Toy Car, TableSystem = Toy Car, Table, Earth3

The Ball Rolling Down an Incline Lab

Uniformly Accelerated Motion5Example 2 Ball Rolling Down an Incline1234System = System = BallSystem = Ball, InclineFriction = ?Friction = NoSystem = Ball, Incline, EarthIs the system isolated?Yes, there are no external forces!6Example 2 Ball Rolling Down an Incline1234System = System = BallSystem = Ball, EarthSince the system is isolated, energy is conserved.1234

Friction = ?Friction = No

System = Ball, Earth, Incline7The Pendulum Lab

8Example 3 The Pendulum Lab12345System = System = Pendulum Bob

System = Pendulum Bob, String, ClampSystem = Pendulum Bob, StringSystem = Pendulum Bob, String, Clamp, EarthHow can we tell from the diagram if energy is dissipated?Position 5 is lower than position 1!9Example 3 The Pendulum Lab12345Since the system is isolated, energy is conserved.12345Is the system isolated?Yes, there are no external forces!System = Pendulum Bob, String, Clamp, Earth10The Toy Car Lab

Constant Velocity Motion2