What is the difference between a closed and open system?
Closed System: No exchange of matter or energy. | Open System: Exchanges matter and/or energy.
What is the difference between up and down quarks?
Up Quarks: Positive charge. | Down Quarks: Negative charge.
What is the difference between internal and external forces?
Internal Forces: Forces within the system, often ignored when analyzing the whole system. | External Forces: Forces acting on the system from outside, affecting the system's overall motion.
What is the difference between equilibrium and dynamic equilibrium?
Equilibrium: No change over time. | Dynamic Equilibrium: Changes occur, but the system returns to equilibrium.
What is the difference between protons and neutrons?
Protons: Two up quarks and one down quark (positive charge). | Neutrons: Combination of up and down quarks (neutral charge).
What is the effect of applying an external force to a system?
The system accelerates according to Newton's Second Law ($\Sigma F = ma$).
What happens when a system is closed?
There is no exchange of matter or energy with the surroundings.
What happens when the net external force on a system is zero?
The system remains at rest or continues to move with constant velocity.
What happens when the force applied to a block increases?
Greater acceleration.
What happens when a force is applied opposite to the motion?
Velocity decreases.
What are the differences between a closed system and an open system?
Closed System: No exchange of matter or energy. | Open System: Exchanges matter and/or energy.
What is the difference between external and internal forces?
External Forces: Forces acting on the system from outside, affecting overall motion. | Internal Forces: Forces acting within the system, often negligible for overall motion.
