Newton's Laws of Motion

10 Pages

English

High School

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Foundations of Motion

1. Motion, Force, and Inertia

2. Reference Frames and Net Force

3. Newton’s First Law of Motion

4. Inertia in Everyday Situations

5. Free-Body Diagrams

Newton's Laws and Applications

6. Force, Mass, and Acceleration

7. Mass, Weight, and the Pull of Gravity

8. Action–Reaction Pairs in Newton’s Third Law

9. Contact Forces: Friction, Tension, and Support

10. A Reliable Method for Newton’s Law Problems

1. Motion, Force, and Inertia

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Can an object be moving even when no force is pushing it forward?

Why is it harder to push a full cart than an empty cart?

Motion:

Force:

Inertia:

Mass:

Motion:

Force:

Inertia:

Mass:

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2. Reference Frames and Net Force

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If the net force is zero, must an object be at rest?

Why does direction matter when adding forces?

Reference frame:

Vector:

Net force:

Balanced forces:

Reference frame:

Vector:

Net force:

Balanced forces:

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3. Newton’s First Law of Motion

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Why does a rolling bicycle eventually slow down if Newton's First Law is true?

Does turning count as acceleration if speed stays the same?

Newton's First Law:

Constant velocity:

Friction:

External force:

Newton's First Law:

Constant velocity:

Friction:

External force:

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4. Inertia in Everyday Situations

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Why do objects fly forward when a vehicle stops suddenly?

Would a heavier passenger need a stronger seat belt force in the same crash?

Seat belt:

Momentum:

Airbag:

Acceleration:

Seat belt:

Momentum:

Airbag:

Acceleration:

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5. Free-Body Diagrams

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Should a free-body diagram include an arrow showing the object's motion?

Why are weight and normal force not always equal?

Free-body diagram:

Weight:

Normal force:

Tension:

Free-body diagram:

Weight:

Normal force:

Tension:

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6. Force, Mass, and Acceleration

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Can an object move even when the net force is zero?

Why does a force not always make an object speed up?

Net force:

Newton (N):

Mass:

Acceleration:

Net force:

Newton (N):

Mass:

Acceleration:

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7. Mass, Weight, and the Pull of Gravity

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Would an astronaut have no mass in space?

Why is weight measured in newtons rather than kilograms?

Weight:

Gravitational field strength:

Mass:

Normal force:

Weight:

Gravitational field strength:

Mass:

Normal force:

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8. Action–Reaction Pairs in Newton’s Third Law

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If third-law forces are equal, why can anything accelerate?

Does a rocket need air behind it to move?

Action–reaction pair:

Interaction:

Free-body diagram:

Recoil:

Action–reaction pair:

Interaction:

Free-body diagram:

Recoil:

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9. Contact Forces: Friction, Tension, and Support

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Why can friction make a car move forward?

Is the normal force always the same as weight?

Static friction:

Kinetic friction:

Coefficient of friction:

Tension:

Static friction:

Kinetic friction:

Coefficient of friction:

Tension:

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10. A Reliable Method for Newton’s Law Problems

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When should several objects be treated as one system?

Does constant speed always mean no forces act?

System:

Force component:

Equilibrium:

Kinematics:

System:

Force component:

Equilibrium:

Kinematics:

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