A | B |

INERTIA | charcteristic of all matter -- depends on object's mass |

LAW OF INERTIA | Body at rest or in motion stays at rest or in motion in straight line, unless acted on by force. |

ISAAC NEWTON | wrote laws of motion , scientist and mathematician, lived about 1700 |

SPEED | distance traveled in certain amount of time, how fast body is moving at a specific moment |

VELOCITY | speed and direction an object moves |

SPEED FORMULA | speed(velocity) = distance/time |

ACCELERATION | how fast speed changes, rate of change in speed, speeding up or slowing down |

ACCELERATION FORMULA | acceleration = (final velocity - starting velocity) / change in time |

DECELERATION | negative acceleration, slowing down, losing speed |

FACTORS DETERMINING ACCELERATION | mass of body and force acting on body |

LAW OF ACTION REACTION | For each force (action force), there is an equal and opposite reaction force |

G | the force of gravity at sea level, a unit of gravitational force |

ACCELERATION OF GRAVITY | acceleration of any falling object caused by the pull of gravity, 9.8 m/s/s |

TERMINAL VELOCITY | speed reached when falling object stops accelerating, air resistance equals pull of gravity |

CENTRIPETAL FORCE | any force toward the inside of a curved or circular path |

2 THINGS CAUSE CURVED PATH | body's inertia and the centripetal force on it |

CENTRIFUGAL FORCE | NOT a real force, really inertia moving object in straight line during curve |

"BANKED" CURVE | outside of curve is raised to allow gravity to pull body to inside (centripetal force) |

CENTRIPETAL FORCE EXAMPLES | gravity holding Earth in orbit around sun (also moon around Earth), friction between tires and road |

MOMENTUM | characteristic of all moving matter, product of mass and speed of body |

MOMENTUM FORMULA | momentum = mass X velocity (p=m x v) |

2 FACTORS DETERMINE MOMENTUM | mass and velocity of object |

LAW OF CONSERVATION OF MOMENTUM | Momentum cannot be created or destoyed; it can be transferred form one object to another. |

VELOCITY VECTOR | arrow that represents both speed and direction of motion, scale model |