All Flashcards
What is Work in physics?
Energy transferred when a force acts over a distance.
Define Conservative Force.
A force where the work done is path-independent.
Define Nonconservative Force.
A force where the work done is path-dependent.
What is the Work-Energy Theorem?
The net work done on an object equals its change in kinetic energy.
Define Potential Energy.
Energy associated with conservative forces.
What is the effect of friction on mechanical energy?
Friction dissipates mechanical energy as thermal energy.
What happens when the net work done on an object is positive?
The object's kinetic energy increases.
What happens when a system returns to its starting point under a conservative force?
The work done by the conservative force is zero.
What is the effect of external forces on a system?
External forces can change a system's configuration.
What are the key differences between Conservative and Nonconservative forces?
Conservative: Path-independent, potential energy exists, net work is zero over a closed path. | Nonconservative: Path-dependent, no potential energy, net work is not zero over a closed path.
Compare Positive, Negative, and Zero Work.
Positive: Energy added to the system. | Negative: Energy removed from the system. | Zero: No energy change.
What is the difference between work and energy?
Work: The process of energy transfer. | Energy: The state or capacity to do work.