Newton's First Law - AP Physics C: Mechanics
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What is the net force on a moving object with constant velocity?
What is the net force on a moving object with constant velocity?
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The net force is zero. Constant velocity requires zero net force.
The net force is zero. Constant velocity requires zero net force.
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Identify the net force on an object in equilibrium.
Identify the net force on an object in equilibrium.
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The net force is zero. Equilibrium means balanced forces.
The net force is zero. Equilibrium means balanced forces.
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What is the relationship between mass and inertia?
What is the relationship between mass and inertia?
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Inertia is directly proportional to mass. More massive objects resist changes more.
Inertia is directly proportional to mass. More massive objects resist changes more.
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What net force is required to keep an object moving at a constant speed in a straight line?
What net force is required to keep an object moving at a constant speed in a straight line?
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Zero net force is required. Constant motion requires no net force.
Zero net force is required. Constant motion requires no net force.
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What is Newton's First Law of Motion?
What is Newton's First Law of Motion?
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An object in motion stays in motion; an object at rest stays at rest unless acted on by a net force. Also known as the law of inertia.
An object in motion stays in motion; an object at rest stays at rest unless acted on by a net force. Also known as the law of inertia.
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What is the state of motion for an object with zero net force?
What is the state of motion for an object with zero net force?
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The object remains at rest or moves with constant velocity. Zero net force means no acceleration.
The object remains at rest or moves with constant velocity. Zero net force means no acceleration.
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Define inertia in the context of Newton's First Law.
Define inertia in the context of Newton's First Law.
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Inertia is the tendency of an object to resist changes in its state of motion. Also called the law of inertia.
Inertia is the tendency of an object to resist changes in its state of motion. Also called the law of inertia.
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What is Newton's First Law of Motion?
What is Newton's First Law of Motion?
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An object in motion stays in motion; an object at rest stays at rest unless acted on by a net force. Also known as the law of inertia.
An object in motion stays in motion; an object at rest stays at rest unless acted on by a net force. Also known as the law of inertia.
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Identify the effect of unbalanced forces on an object.
Identify the effect of unbalanced forces on an object.
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Unbalanced forces cause acceleration. Unbalanced forces produce acceleration.
Unbalanced forces cause acceleration. Unbalanced forces produce acceleration.
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What is the condition for an object to maintain constant speed in a straight line?
What is the condition for an object to maintain constant speed in a straight line?
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Zero net force is required. Straight-line constant speed needs balance.
Zero net force is required. Straight-line constant speed needs balance.
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What force is necessary to change the direction of a moving object?
What force is necessary to change the direction of a moving object?
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A net external force is necessary. Direction change requires acceleration.
A net external force is necessary. Direction change requires acceleration.
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Identify the motion state of an object with no net external force.
Identify the motion state of an object with no net external force.
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It remains at rest or in uniform motion. No net force maintains current motion.
It remains at rest or in uniform motion. No net force maintains current motion.
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What is the net force acting on an object moving at constant velocity?
What is the net force acting on an object moving at constant velocity?
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The net force is zero. Constant velocity implies zero acceleration.
The net force is zero. Constant velocity implies zero acceleration.
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State Newton's First Law in terms of net force and motion.
State Newton's First Law in terms of net force and motion.
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An object remains in its state of motion if the net force is zero. Zero net force maintains motion state.
An object remains in its state of motion if the net force is zero. Zero net force maintains motion state.
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Why does a stationary object remain at rest according to Newton's First Law?
Why does a stationary object remain at rest according to Newton's First Law?
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Because the net force acting on it is zero. No unbalanced forces act on stationary objects.
Because the net force acting on it is zero. No unbalanced forces act on stationary objects.
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Which force is responsible for stopping a moving object eventually?
Which force is responsible for stopping a moving object eventually?
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A net external force like friction. Unbalanced forces cause motion changes.
A net external force like friction. Unbalanced forces cause motion changes.
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How does Newton's First Law relate to the concept of equilibrium?
How does Newton's First Law relate to the concept of equilibrium?
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Objects in equilibrium have zero net force and constant velocity. Equilibrium is zero net force condition.
Objects in equilibrium have zero net force and constant velocity. Equilibrium is zero net force condition.
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What does Newton's First Law suggest about objects in uniform circular motion?
What does Newton's First Law suggest about objects in uniform circular motion?
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A net force is required to maintain circular motion. Circular motion involves constant acceleration.
A net force is required to maintain circular motion. Circular motion involves constant acceleration.
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What is the principle that explains why a book remains at rest on a table?
What is the principle that explains why a book remains at rest on a table?
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Newton's First Law of Motion. First Law explains objects at rest.
Newton's First Law of Motion. First Law explains objects at rest.
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Identify the condition that allows an object to maintain its state of motion.
Identify the condition that allows an object to maintain its state of motion.
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Zero net external force. No unbalanced forces acting on object.
Zero net external force. No unbalanced forces acting on object.
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When does an object experience no change in motion according to Newton's First Law?
When does an object experience no change in motion according to Newton's First Law?
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When net force is zero. Zero net force maintains motion state.
When net force is zero. Zero net force maintains motion state.
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Determine the net force on a stationary object with balanced forces.
Determine the net force on a stationary object with balanced forces.
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The net force is zero. Stationary objects have balanced forces.
The net force is zero. Stationary objects have balanced forces.
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What is the effect of mass on the acceleration of an object given constant force?
What is the effect of mass on the acceleration of an object given constant force?
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Greater mass results in less acceleration. Relates to Newton's Second Law: $F = ma$.
Greater mass results in less acceleration. Relates to Newton's Second Law: $F = ma$.
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What does it mean for an object to be in mechanical equilibrium?
What does it mean for an object to be in mechanical equilibrium?
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The object has zero net force and no acceleration. Zero acceleration and zero net force.
The object has zero net force and no acceleration. Zero acceleration and zero net force.
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Identify the condition that causes an object to accelerate.
Identify the condition that causes an object to accelerate.
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A non-zero net force causes acceleration. Acceleration requires unbalanced forces.
A non-zero net force causes acceleration. Acceleration requires unbalanced forces.
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What happens to a moving object if no external force acts on it?
What happens to a moving object if no external force acts on it?
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It continues moving at constant velocity. No force means no acceleration.
It continues moving at constant velocity. No force means no acceleration.
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What net force is required to keep an object moving at a constant speed in a straight line?
What net force is required to keep an object moving at a constant speed in a straight line?
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Zero net force is required. Constant motion requires no net force.
Zero net force is required. Constant motion requires no net force.
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What is the effect of balanced forces on an object's motion?
What is the effect of balanced forces on an object's motion?
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The object remains at rest or in uniform motion. Balanced forces produce zero acceleration.
The object remains at rest or in uniform motion. Balanced forces produce zero acceleration.
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Which law explains why passengers lurch forward in a suddenly stopping car?
Which law explains why passengers lurch forward in a suddenly stopping car?
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Newton's First Law due to inertia. Passengers continue moving forward due to inertia.
Newton's First Law due to inertia. Passengers continue moving forward due to inertia.
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What is required to change the velocity of an object in motion?
What is required to change the velocity of an object in motion?
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A net external force is required. Change in motion requires unbalanced force.
A net external force is required. Change in motion requires unbalanced force.
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