| A | B |
|---|
| static friction | friction that acts on objects that are not moving |
| sliding | friction that occurs when two solid surfaces slide over each other |
| rolling | friction that occurs when an object rolls acroos a surface |
| fluid friction | friction that occurs when a solid object moves through a liquid such as water oil or air |
| 2nd | Newton's law that states that acceleration depends on the object's mass and on the net force acting on the object |
| m/s2 | unit of acceleration |
| kilogram (kg) or m/s | unit of mass |
| Newton | unit of force |
| momentum (P) | mass X velocity is the formula for what |
| total momentum of any group of objects remains the same, or is conserved unless outside forces act on the objects | law of conservation of momentum |
| acceleration | measurement on how fast an object is changing speed |
| mass x acceleration | formula for force |
| force | if mass or acceleration increases proportionally, the _________ will increase |
| friction | caused when two surfaces come in contact with each other |
| how hard the surfaces push together and the types of surfaces involved | the force of friction depends on what two factors |
| momentum | mass in motion |
| they add together | what happens when two forces act in the same direction |
| force | mass X acceleration |
| friction | the rougher the surface area the greater the ? |
