Forces Flashcards
Definition of a contact force?
A force that only acts between objects that are touching
A definition of a force?
A force is a push, pull or twist operating on an object. Measured in newtons (N)
Definition of a non-contact force?
A force that acts only between objects even though the objects are not touching
What do like poles do?
Repell
What do non-like poles do?
Attract
Examples of non-contact forces and what they do?
- gravity, pull
- magnetic,push/pull
- static electricity, push/pull
Examples of contact forces and what they do?
- friction,push
- Buoyancy,push
- air resistance, push/drag
- surface tension,pull
- thrust,push
How is gravity useful?
Gravity helps humans and objects stay on the ground
How is a magnetic force useful?
Magnetic fields are used in the modern technology such as electric engineering and electromechanics.
How is static electricity useful?
Antistatic floors- are used in hospitals to avoid static charge.
How is friction useful?
Friction between our shoes and the ground helps us from slipping.
How is buoyancy useful?
Buoyancy keeps a boat on top of the water so it doesn’t sink
How is air resistance useful?
Wind in the sails of a sailboat. ( the moving wind meets the Resistance of the sail, and pushes the boat forward.
How is surface tension useful ?
Surface tension keeps a liquid together.
How is thrust useful?
Thrust can help an aircraft
