All Flashcards
What are the differences between internal and external forces?
Internal Forces: Act within the system, do not affect the center of mass motion. | External Forces: Act on the system from outside, do affect the center of mass motion.
Compare real and ideal strings.
Ideal Strings: Negligible mass, inelastic, constant tension. | Real Strings: Have mass, can stretch, tension may vary.
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.
What is the effect of an external force on a system?
It changes the motion of the system's center of mass.
What is the effect of the weight of a real string on the tension?
The tension varies along the length of the string, usually being maximum at the top.
What is the effect of pushing on a wall?
The wall pushes back on you with an equal and opposite force.
What is the effect of internal forces acting within a system?
They cancel each other out and do not affect the motion of the system's center of mass.
What is the effect of using multiple ideal pulleys in a block and tackle system?
They multiply the applied force, making it easier to lift heavy loads.