| zero | | when moving objects slide over each other, some kinetic energy is converted to this form of energy; also called thermal energy |
| conservation of momentum | | the sum of all forces acting on an object |
| milli | | type of stored energy; equals mass times gravity times height; increases with the height of an object |
| work | | an experiment in which tests of a hypothesis are identical except for changes in a single independent variable |
| meter | | variable that the experimenter manipulates during an experiment; usually graphed on the x axis |
| energy | | rate of change in velocity; acceleration occurs if either speed or direction change |
| first | | a push or a pull |
| inverse | | always less than 100% due to friction; equals 100% times output Work/input work |
| power | | the slope of a graph having distance on the y axis and time on the x axis |
| net force | | a force exerted as objects move against each other, due to sticking of surfaces together; acts in a direction that opposes motion |
| Newton | | multiplication of force by a simple machine; MA; equals output force divided by input force |
| controlled | | metric unit of measure for length |
| deceleration | | metric prefix showing that 1/100 units are present; for example, 1 cm = 1/100m |
| independent | | type of graphical relationship showing one value increasing as the other is decreasing |
| fulcrum | | unit of work or energy; a force of 1 N exerted over a distance of 1 m; 1 Nm |
| joule | | acceleration when speed is constant and direction is constant |
| second | | Newton's law stating that objects remain at rest unless acted on by unbalanced forces |
| friction | | metric unit of measure for mass |
| nine | | a tests of a hypothesis |
| kinetic | | the ability to do work (to make a mass move) |
| weight | | watts; the rate at which energy is used; work/time |
| average speed | | Newton's law stating that forces act in pairs of equal size but opposite direction |
| kilogram | | unit describing power; equals use of 1 Joule of energy in 1 s |
| g | | symbol p; p=mv |
| mechanical advantage | | multiple by which kinetic energy increases if speed increases three times |
| slope | | term for negative acceleration |
| liter | | metric unit of measurement for volume |
| third | | rotating (balancing) point for a lever |
| input arm | | graphical relationship showing both x and y values increasing or decreasing simultaneously |
| efficiency | | sum of potential |
| intertia | | the side of a lever that a person exerts force upon |
| force | | equals the mass of object times g; the force gravity exerts on a mass; changes if g changes |
| horsepower | | metrix prefix showing that 1000 units are present; for example, 1 km = 1000m |
| centi | | distance divided by time; direction is indicated by a or - sign; if direction isn't described, then the value is termed speed |
| mass | | equals 746 watts |
| potential | | Newton's law stating that F=ma |
| hypothesis | | force X distance; measured in Newton-meters or Joules |
| total | | type of energy causing motion |
| heat | | an educated guess which is either supported or not when conclusions are drawn |
| watt | | how much matter an object contains; measured in g or kg; constant anywhere in the universe |
| velocity | | law stating that energy can neither be created nor destroyed, but can be converted from form to form |
| acceleration | | property of matter increasing with mass |
| conservation of energy | | acceleration due to gravity; 9.8 m/s/s on earth |
| dependent | | when objects collide, the sum of their momentums (p) before |
| constant | | metric prefix showing that 1/1000 units are present; for example, 1mm = 1/1000 m |
| experiment | | description of velocity when a distance/time graph is a straight line |
| direct | | unit of F; equivalent to 4.48 lbs; equals 1 kg m/s/s |
| momentum | | rise over run; (y2-y1)/(x2-x1) |
| kilo | | the variable that changes as a result of the manipulations in the independent variable; usually graphed on the y axis |
