All Flashcards
What is the difference between internal and external forces?
Internal forces: Act within a system, do not affect COM motion. | External forces: Act on the system from outside, can change COM motion.
What is the difference between ideal and non-ideal strings?
Ideal strings: Negligible mass, do not stretch, uniform tension. | Non-ideal strings: Have mass, can stretch, non-uniform tension.
How do gravitational forces differ between AP Physics 1 and AP Physics 2?
AP Physics 1: Focuses on gravitational forces only. | AP Physics 2: Includes gravitational, electric, and magnetic forces.
Define Newton's Third Law.
For every action, there is an equal and opposite reaction.
What is an internal force?
A force between objects within a system.
What is an external force?
A force between an object in the system and something outside the system.
Define tension.
The pulling force transmitted through a string, cable, or similar object when it's pulled tight.
What is an ideal pulley?
A simple machine that changes the direction of a tension force.
What are the key differences between internal and external forces?
Internal forces: Act within a system, do not affect center of mass motion. | External forces: Act on the system from outside, do affect center of mass motion.
Differentiate between real and ideal strings regarding tension.
Ideal strings: Tension is constant throughout. | Real strings: Tension can vary due to the string's weight.