P2.2.1 - Forces And Interactions Flashcards
1
Q
When do pairs of forces arise?
A
When objects interact
2
Q
What is Newton’s Third Law?
A
For every reaction there is an equal and opposite reaction
3
Q
What does Newton’s Third Law imply?
A
In an interaction pair:
Each force acts on a different object
The sizes of the forces are the same
The forces act in opposite directions
4
Q
State examples of non-contact forces.
A
Electrostatics, magnetism and gravity
5
Q
What do you represent forces with?
A
Force arrows
6
Q
Why does the earth not go towards you when you fall towards it?
A
Its mass is too large
7
Q
What happens when you let go of compressed bonds?
A
They spring back and exert a force
8
Q
Name examples of contact forces.
A
Friction, drag, contact force, up thrust, tension
