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# Study Guide

### Forces Test SG

Description | Answer |
---|---|

force that pulls objects towards each other | gravity |

product of an object's mass & velocity transfer of energy from one object to another | momentum |

tendency of an object to resist any change in motion | inertia |

Newton's first law states, "An object in motion will continue in motion." Why does an object stop? | friction& gravity |

What is the net force of a balanced force? | 0 |

What is the net force of an unbalanced force | greater than 0 |

WHat is the difference between weight and mass? | mass- balance weight- gravity |

Why does mass not make a difference in free fall? | all accelerate at the same rate regardless of mass |

How does gravity affect objects that are moving horizontally? | objects will hit the ground at the same time (pulls objects down) |

How is mass related to inertia | more mass greater inertia |

How is mass related to momentum? | the more mass more momentum |

What happens to the momentum of 2 objects after they collide? | energy is absorbed or transferred from one object to another |

What acceleration does all objects free fall? | 9.8 meters per second squared 32ft. per sec. squared |

occurs when a solid object moves through a fluid Examples- surfing& swimming | fluid friction |

friction that occurs when one solid surface slides over another examples- iceskating skiing | sliding friction |

friction that acts on objects that aren't moving examples- cup table | static friction |

when an object rolls across a surface examples- bicycle skateboards | rolling friction |

Newton is perhaps most famous for what? | three laws about objects in motion and the forces that act on them |

Newton's work wrote them and called them what? | Newton's laws of Motion |

Newton's first law f motion concerns | inertia |

objects that are still remain | still |

objets that are moving | continue moving with a constant velocity |

Newton's second law concerns | acceleration |

A bowling ball is more difficult to do what than a tennis ball | throw |

Newton's third law of Motion is what | the motion of action and reaction |

when you hit a baseball with an aluminum bat | the ball has another equal and opposite reaction |

Inertia lab | pennies |

Acceleration depends on | he object's mass and on the net force acting on it |

An object moving at a contsant velocity | will continue moving unless acts don by an unbalanced force |

if one object exerts the second object exerts force of equal strength in the opposite direction on the first object | 3rd law |

mass times velocity = | momentum |

the equation for newton's second law is... | forces= mass times acceleration |

golf ball lab | 3rd law-momentum |

Momentum equation is... | mass times velocity = momentum |

golf ball lab | newton's 3rd law |

rocket lab | newton's second law |

Created by:
ewoodham