Newton’s First Law (Grade 11 NSC Matric Physical Sciences): Flashcards
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10 cards from this deck
Newton's life span
Newton's life span
1642 to 1727
Newton's First Law of Motion
Newton's First Law of Motion
Object stays at rest/uniform motion unless unbalanced force acts
Inertia
Inertia
Tendency to resist changes in motion
What unbalanced force does to object's motion
What unbalanced force does to object's motion
Changes its state of motion
Why ice skater eventually slows down
Why ice skater eventually slows down
Friction between skates & ice, plus air resistance
Why kicked football stops rolling
Why kicked football stops rolling
Air resistance and friction oppose movement
Passengers in car at 120 km/h when car suddenly stops
Passengers in car at 120 km/h when car suddenly stops
Continue moving at 120 km/h due to inertia
Rocket in space with engines off
Rocket in space with engines off
Continues at constant velocity indefinitely
Passengers thrown to side in turning car - why
Passengers thrown to side in turning car - why
Inertia makes them continue in original straight path
When does Newton's First Law apply perfectly
When does Newton's First Law apply perfectly
When no external forces are present