| Term | Definition |
| force | push or pull on an object |
| type A: contact | tension, elastic, friction |
| type B: at-a-distance | gravitational, electrostatic, magnetic |
| mass | (kg, g)
amount of matter in an object
always stays the same |
| weight | (N)
amount of force on an object due to gravity
changes depending on where you are in the universe |
| balanced forces | equal in strength
oppose each other in direction
keep object moving at constant speed and direction |
| unbalanced forces | cause change in speed or direction of an object |
| pressure | amount of force acting on an area or an object
increase pressure=smaller volume=particles closer together |
| formula for pressure | P = F/A |
| compression | decrease in volume from force |
| compressible: gasses? | yes, large amount of space between particles |
| compressible: liquids? | no, incompressible |
| compressible: solids? | no, incompressible |
| kinetic energy in gasses | when energy is added to a gas, the kinetic energy of the particles is increased
warmer gas expands faster that cooler gas |
| gas in pressurized containers (aerosols) | when aerosols are heated, pressure increases
fast-moving particles bounce against sides of container
could cause explosion |
| deformation | change of shape without being forced into smaller volume |
| unit for pressure | 1 N/m2 = 1 Pascal (Pa) |
| implosion | collapse inward
air pressure inside is lower than air pressure outside of container |
| viscosity | fluid's resistance to flow
liquid's viscosity decreases when heated, increases when cooled
gas's increases when heated, decreases when cooled |
| adhetion | attraction or joining two objects or fluids to each other |
| cohesion | the strength with which the particles of an object or fluid attract each other |
| viscosity: the effects of particle shapes | higher viscosity=more complicated shape of molecules |
| flow rate | speed at which fluid flows from one point to another |
| surface tension | property of a liquid in which the surface of it acts like a thin membrane or skin |
