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# motion and stuff

### ch 1 and 2

Question | Answer |
---|---|

whats a reference point? | place or object used for comparison to determine if something is in motion |

when is an object in motion? | if it changes position relatice to its refernce point |

whats the equation for average speed? | s=d/t, speed=distance/time |

whats acceleration? | change in velocity divided by the time it takes for a change to occur |

whats speed? | the distance traveled divided by the time taken to travel the distance |

whats the avg speed? | same thing as speed practically use same equation |

instantaneous speed is? | the speed of an object at one instant of time |

whats velocity? | the speed of the object and the direction of its motion |

whats the mass? | amount of matter in an object |

whats inertia | when an object resists to a change in motion |

whats momentum ? | the measure of how hard it is to stop the object |

what does momentum depend on? | mass and velocity |

The law of the conservation of the momentum? | the total momentum of the objects that collide is the same before and after the collision |

whats the equation to find out velocity? | avg speed equation |

whats the acceleration equation? | final speed-initial speed/time or Sp-Si/t |

whats the equation of momentum? | p=mv or momentum=mass*velocity |

whats the equation for force? | force=mass*acceleration or F=kg*m/s2=1N |

whats velocity? | speed and direction |

whats acceleration? | change in velocity |

whats the acceleration of gravity? | 9.8m/s2 |

whats force? | a push or pull |

whats balanced force? | equal in size, opposite in direction |

whats the net force? | the resulting force after all the forces have been added |

What was newtons 1st law of motion? | matter in motion tends to stay in motion unless acted on by another force. |

whats friction? | force that opposes sliding between 2 surfaces that are touching |

what does friction depend on? | pressure and surface |

what are the types of friction? | static friction:no motion, sliding friction:sliding hands up & down, rolling:like a car or bike down a hill |

whats gravity ? | force thats exerted between two objects that pull it together |

what does gravity depend on? | mass |

whats newtons 2nd law of the motion? | big things need big pushes little things need little pushes |

what is force measured in? | newtons ex. 50kg*10m/s=500N |

what is distance? | the length u travel |

whats displacement? | the direction and difference in position between your starting and ending points |

whats a balanced force/ | no motion |

whats unbalanced force? | motion |

what happens for every reaction? | theres and equal or opposite reaction |

Created by:
VaLeRiA!