All Flashcards
What is potential energy?
Stored energy within a system due to the positions of its components.
What is a conservative force?
A force where the work done is independent of the path taken.
What is a non-conservative force?
A force that dissipates energy as heat and does not have an associated potential energy.
What is stable equilibrium?
A state where, if you nudge the system, it returns to its original position; corresponds to a local minimum on the potential energy curve.
What is unstable equilibrium?
A state where, if you nudge the system, it moves away from its original position; corresponds to a local maximum on the potential energy curve.
Define gravitational potential energy near Earth's surface.
The potential energy an object has due to its height above a reference point, given by the formula:
What is potential energy?
Stored energy within a system due to the positions of objects.
What are conservative forces?
Forces that allow a system to store energy; work done is path-independent.
What are non-conservative forces?
Forces that dissipate energy as heat, preventing the system from storing potential energy.
What is the spring constant (k)?
A measure of the stiffness of a spring.
What is gravitational field (g)?
The acceleration due to gravity, approximately 9.8 m/s² on Earth.
Define displacement (Δx) in the context of springs.
The distance a spring is stretched or compressed from its equilibrium length.
What are the key differences between conservative and non-conservative forces?
Conservative Forces: Work done is path-independent, net work in a closed loop is zero, potential energy can be defined. Non-Conservative Forces: Work done is path-dependent, net work in a closed loop is non-zero, potential energy cannot be defined.
Compare gravitational potential energy near Earth's surface and for point masses.
Near Earth's Surface: , valid for small changes in height. Point Masses: , valid for any separation distance, uses a zero point at infinite separation.
Differentiate between stable and unstable equilibrium points on a potential energy curve.
Stable Equilibrium: Local minimum, system returns to equilibrium after a small disturbance, concave up. Unstable Equilibrium: Local maximum, system moves away from equilibrium after a small disturbance, concave down.