All flashcards
Flashcard 1: What is required to change an object's state of motion?
Answer: Net external force. Only unbalanced forces can alter an object's motion state.
Flashcard 2: How does mass affect an object's inertia?
Answer: Greater mass, greater inertia. Mass directly determines how much an object resists motion changes.
Flashcard 3: In a tug-of-war, if both sides pull equally, what is the net force?
Answer: Zero. Equal forces in opposite directions cancel completely.
Flashcard 4: Predict the motion: A car moving at constant speed on a straight road.
Answer: Net force is zero. Constant speed indicates balanced forces acting on the vehicle.
Flashcard 5: In the absence of external forces, what remains constant for a moving object?
Answer: Velocity. No external forces means no change in motion state.
Flashcard 6: Predict the motion: A car moving at constant speed on a straight road.
Answer: Net force is zero. Constant speed indicates balanced forces acting on the vehicle.
Flashcard 7: What happens to an object if all forces cancel each other?
Answer: No change in motion. Equilibrium condition maintains current state of motion.
Flashcard 8: State the condition for an object to be in equilibrium.
Answer: Net external force is zero. When all forces balance out, no acceleration occurs.
Flashcard 9: Describe motion when net force on an object is zero.
Answer: Constant velocity or at rest. Newton's First Law describes motion under equilibrium conditions.
Flashcard 10: What is the effect of friction on a moving object?
Answer: It opposes motion, creating a net force. Creates unbalanced force that causes deceleration over time.
Flashcard 11: Identify the force required to maintain constant velocity in the absence of friction.
Answer: No force is required. Objects naturally maintain constant velocity without external forces.
Flashcard 12: Identify the term for the resistance to change in motion.
Answer: Inertia. The property that makes objects resist changes to their motion state.
Flashcard 13: Define net force.
Answer: The vector sum of all forces acting on an object. Determines whether an object will accelerate or remain in equilibrium.
Flashcard 14: What is the unit of force in the International System of Units (SI)?
Answer: Newton (N). Standard unit for measuring force in physics calculations.
Flashcard 15: What type of force must act for a change in motion to occur?
Answer: Net external force. Only unbalanced forces can cause acceleration or deceleration.
Flashcard 16: Which law describes the relationship between force, mass, and acceleration?
Answer: Newton's Second Law. Expressed mathematically as F=ma for net force calculations.
Flashcard 17: Explain using Newton's First Law: A spacecraft coasting in space.
Answer: No net force, constant velocity. No external forces act, so spacecraft maintains constant velocity.
Flashcard 18: What happens to an object in motion when no net force acts on it?
Answer: It continues in uniform motion. Objects maintain constant velocity when no net force acts on them.
Flashcard 19: What is the result of balanced forces acting on an object?
Answer: No change in motion. Equal and opposite forces cancel out, maintaining current motion state.
Flashcard 20: What is required to change an object's state of motion?
Answer: Net external force. Only unbalanced forces can alter an object's motion state.
Flashcard 21: In a tug-of-war, if both sides pull equally, what is the net force?
Answer: Zero. Equal forces in opposite directions cancel completely.
Flashcard 22: Identify the correct outcome: An unbalanced force causes uniform motion.
Answer: Incorrect, causes acceleration. Unbalanced forces create acceleration, not uniform motion.
Flashcard 23: What happens to an object at rest when no net force acts on it?
Answer: It remains at rest. Newton's First Law states objects at rest stay at rest without net force.
Flashcard 24: State the law that explains why a book remains on a table.
Answer: Newton's First Law. Gravity and normal force balance, creating equilibrium state.
Flashcard 25: Define equilibrium in terms of forces.
Answer: Sum of forces equals zero. Mathematical condition for Newton's First Law to apply.
Flashcard 26: How does mass affect an object's inertia?
Answer: Greater mass, greater inertia. Mass directly determines how much an object resists motion changes.
Flashcard 27: What is the effect of removing a net force from a moving object?
Answer: Continues in uniform motion. Inertia maintains the existing motion when forces are removed.
Flashcard 28: Name the tendency of an object to resist changes in motion.
Answer: Inertia. Fundamental property that opposes any change in motion.
Flashcard 29: If an object is moving at constant velocity, what is the net force?
Answer: Zero. Constant velocity indicates all forces are perfectly balanced.
Flashcard 30: If two people push a box equally from opposite sides, what is the net force?
Answer: Zero. Equal and opposite forces result in no net force.