Contact and Non Contact forces Flashcards
what type of quantity is force
force is a vector quantity
when do non contact forces happen
when the objects are not touching
give examples of non contact forces
1) Gravitational force
2) Electrostatic force
3) Magnetic Force
when do contact forces happen
contact forces happen when both objects are physically touching
give examples of contact forces
1) Friction
2) Air resistance
3) Normal contact force
4) Tension
when you push down on a table why doesn’t your hand move through it
this is because the normal contact force from the table pushes equally on your hand
what is tension
tension is the pulling force that a string exerts when something or someone pulls on it
how does air resistance come about
air resistance comes about when an object moving through the air collides with the air molecule
what does friction oppose
friction opposes motion
what can reduce friction levels
lubricants such as oils can reduce friction levels
give another example of a frictional force
Air resistance
what is an interaction pair
an interaction pair is a set of 2 forces that are equal and opposite
