All Flashcards
What is the effect of applying an external force to a system?
The system accelerates according to Newton's Second Law ().
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.
What are the steps to analyzing a system using Newton's Second Law?
- Define the system. 2. Identify external forces. 3. Calculate net external force. 4. Apply ΣF = ma to find acceleration.
What are the steps to solving a problem involving a box on an incline?
- Define the system (box, incline, etc.). 2. Identify external forces (gravity, normal force). 3. Apply ΣF = ma. 4. Calculate normal force (N = mg*cos(θ)).