All Flashcards
What is work?
The transfer of energy when a force acts on an object over a distance.
What is a scalar quantity?
A quantity that has magnitude only, not direction.
What is a conservative force?
A force where the work done is path-independent; only the start and end points matter.
What is potential energy?
Energy associated with conservative forces.
What is a nonconservative force?
A force where the work done depends on the path taken.
What is the effect of a nonconservative force like friction?
Dissipates energy, usually as heat.
What happens when net work is done on an object?
The object's kinetic energy changes.
What is the effect of a perpendicular force on an object's kinetic energy?
No change in kinetic energy; only changes direction.
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.