All Flashcards
What are the differences between an open and a closed system?
Open System: Exchanges both matter and energy. | Closed System: Exchanges energy, but not matter.
What are the differences between positive and negative work?
Positive Work: Work done on the system, increasing its energy. | Negative Work: Work done by the system, decreasing its energy.
Differentiate between internal and external forces.
Internal Force: Force exerted by an object within the defined system. | External Force: Force exerted on the system by an object outside of it.
What is the difference between work and power?
Work: The transfer of energy. | Power: The rate at which work is done.
What is the effect of doing positive work on a system?
The total energy of the system increases.
What is the effect of doing negative work on a system?
The total energy of the system decreases.
What happens when external interactions occur with a system?
The total energy of the system can change.
What happens when a force moves an object parallel to the force?
Work is done, and energy is transferred.
Define 'Conservation of Energy'.
The total energy within a closed system remains constant; energy cannot be created or destroyed, only transformed.
What is 'Kinetic Energy'?
Energy possessed by an object due to its motion.
Define 'Potential Energy'.
Energy possessed by an object due to its position or configuration.
What is 'Thermal Energy'?
Energy associated with the temperature of an object or system.
Define 'Work' in physics.
The transfer of energy that occurs when a force moves an object parallel to the force.
What is 'Power'?
The rate at which work is done or energy is transferred.