All Flashcards
How to analyze energy conservation in a system?
- Define the system. 2. Identify energy types. 3. Account for work done on/by the system. 4. Apply conservation of energy:
Steps to solve conservation of energy problems?
- Identify initial and final states. 2. Determine energy forms at each state. 3. Account for any work done. 4. Set up and solve the conservation of energy equation.
What is the effect of nonconservative forces doing work on a system?
The total mechanical energy of the system changes; energy is often lost as heat or sound.
What happens when only conservative forces act on a system?
The total mechanical energy of the system is conserved.
What is the effect of friction on a moving object?
Friction does negative work, reducing the kinetic energy of the object and converting it to thermal energy.
What are the key differences between conservative and nonconservative forces?
Conservative: Path-independent, potential energy can be defined, total mechanical energy conserved. Nonconservative: Path-dependent, potential energy cannot be defined, total mechanical energy not conserved.
Compare and contrast kinetic and potential energy.
Kinetic: Energy of motion, depends on mass and velocity. Potential: Stored energy, depends on position or configuration (e.g., height or spring compression).