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 |