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# Crawford SS Quiz #5

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

Using your formula chart, what formula can you use if the problem gives you the volume and density and the mass is the unknown? | D = m/v |

Using your formula chart, what formula can you use if the starting speed is 1 m/s and the ending speed is 5 m/s and you need to calculate the acceleration? | A = vf - vi/ time |

Using your formula chart, what formula can you use if the question gives you the mass and acceleration and the force is the unknown? | F = m/a |

What is the formula for speed? | s = d/t |

Using the constants and conversions section of your formula chart, what does (A) mean? | ampere |

What is the formula for Current? | current = voltage/ resistance |

Where on your formula chart can you find what a Hertz is equal to? | Constants and conversions...1 wave cycle/second |

Using the constants and conversions section of your formula chart, what UNITS correspond to the formula, Work - force x distance? | Joule (J)= N x m |

What is the formula for POWER? | Power = work/time |

What is the formula for electrical power? | Electrical power = voltage x current |

what does "vf" mean? | final velocity |

What is the Law of Conservation of Mass? | Law states that the mass of the reactants (before a chemical reaction) will equal the products (after a chemical reaction) |

What is the Law of Conservation of Momentum? | Monetum means that an object has a mass and a velocity. Conservation of Momentum means that objects in a collision will have the same TOTAL momentum before they collide and the same TOTAL momentum after they collide, even if the velocities change. |

What is the Law of Universal Gravitation? | This is a Law that is mainly used to help determine the attraction between 2 planets...based on how close or far apart they are. |

What is the Law of Inertia? | Remember the card and the coin...object at rest stays at rest unless an outside force directly acts on the object |

What is displacement? | Displacement can be used to find the volume of an irregularly shaped object...you read the intial and final volume then subtract |

Acceleration is a __________ in velocity | change |

Velocity is defined as an objects speed and __________ | direction |

If you are taking a turn at 20 mph, is your speed or velocity constant? WHY? | speed is constant...direction is changing which means your velocity is NOT constant |

If the problem gives you the force, distance and time, how do you solve for power? | power is work/time...work isn't given so you substitute in force X distance. New formula is: Power = force x distance/time |

How many formulas on your formula chart use the word mass? | 6 |

Anything falling affected by Earth's gravity will accelerate at a rate of ______ | 9.8 m/s2 |

Using your constants and conversions section, what are the UNITS that go with the formula: F = m x a | N = kg x m/s2 |

Created by:
jwcrawford3