Newton's Third Law (Grade 11 NSC Matric Physical Sciences): Flashcards
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Newton's 3rd Law statement
Newton's 3rd Law statement
If A exerts force on B, B exerts equal & opposite force on A
Term for forces in Newton's 3rd Law
Term for forces in Newton's 3rd Law
Action-reaction pairs
Property 1 of action-reaction pairs (force type)
Property 1 of action-reaction pairs (force type)
Same type of force acts on both objects
Property 2 of action-reaction pairs (magnitude & direction)
Property 2 of action-reaction pairs (magnitude & direction)
Equal magnitude but opposite directions
Property 3 of action-reaction pairs (which objects)
Property 3 of action-reaction pairs (which objects)
Forces act on different objects
Definition of equilibrium
Definition of equilibrium
Sum of all forces acting on object equals zero
Key difference: action-reaction vs balanced forces
Key difference: action-reaction vs balanced forces
Action-reaction on different objects; balanced on same object
Balloon rocket: action force
Balloon rocket: action force
Balloon pushes air out backwards
Balloon rocket: reaction force
Balloon rocket: reaction force
Air pushes balloon forward
Conditions for equilibrium
Conditions for equilibrium
No forces act OR forces are exactly balanced