| A | B |
|---|
| Newton's 2nd Law | the acceleration of an object is in the same direction as the net force on the object |
| unit for Force | kg m/s/s or Newton |
| formula for Force | F=ma |
| the force that opposes motion | FRICTION |
| the name for the uneven surfaces that cause friction | microwelds |
| static friction | resists the movement of 2 surfaces past each other |
| sliding friction | slows the movement of 2 surfaces sliding past each other |
| rolling friction | frictional force between a rolling object and the surface it rolls on |
| fluid friction | friction due to movment through a fluid - air resistance |
| gravity | the attractive force between any two objects |
| gravity depends on ... | mass and distance |
| acceleration due to gravity | 9.8 m/s/s |
| weight | a force due to gravity |
| the formula for weight | mass x acceleration due to gravity |
| Newton's 3rd Law | action/reaction - for every action there is an equal and opposite reaction |
| momentum | the force needed to change an objects motion |
| the letter representing momentum in formulas | P |
| the formula for momentum | P = mv |
| terminal velocity | the constant speed that is reached by falling objects due to air resistance |
| the path of a projectile is ____________ because of the force of gravity | curved |
| the unit of momentum is ... | kg x m/s |
