Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Chapt 2 8th Science

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

The total distance an object travels divided by the travel time for the whole trip | Average Speed |

The rate of change of the velocity of an object | Acceleration |

Forces on an object that are equal in strength but opposite in direction | Balanced Forces |

Speed that remains the same over time | Constant Speed |

The distance and direction an object moves from its starting point | Displacement |

The measure of how far an object has moved | Distance |

Any push or pull exerted on an object | Force |

The resistance that one surface or object encounters when moving over another | Friction |

The tendency of an object to resist change in motion | Inertia |

Speed of an object at a point in time | Instantaneous speed |

The change in position relative to a reference point | Motion |

Speed decreases over time; deceleration | Negative acceleration |

The sum of all the forces on an object | Net force |

Speed increases over time | Positive acceleration |

A measurement that has magnitude only | Scalar quantity |

Distance divided by time | Speed |

Forces on an object that result in a net force. They may be in the same direction, or of differing strengths. | Unbalanced forces |

A measurement that has both direction and magnitude (eg: 50 m/s North) | Vector quantity |

The speed of an object in a direction | Velocity |

What type of graph would be used to plot distance versus time? | A line graph |

What type of speed does a speedometer measure? | Instantaneous speed |

Is distance a scalar or vector quantity? | Scalar |

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

What is the formula for acceleration? | a = (Vf - Vi) / t |

What type of quantity is displacement? | A vector quantity |

What does a horizontal line on a graph of velocity versus time mean? | The object is traveling at a constant rate of speed; there is zero acceleration. |

How does the mass of an object affect its inertia? | A change in the mass would change the inertia |

What is the relationship of force and motion? | It takes force to cause or change motion |

When riding a roller-coaster, what changes do you experience? | Changes in speed and/or direction |

What is Newtonâ€™s First Law of Motion? | An object in motion will stay in motion until a net force acts on it; an object at rest will remain at rest until a net force acts on it. |

In Diagram I (see slides), what is the total distance the professor walks? | He walks 4 meters away, and 4 meters back, making his total distance 8 meters. |

In Diagram I (see slides), what is the professor's displacement after 10 seconds? | His displacement is zero, because he has returned to the same place. |

In Diagram I, what is the professor doing during seconds 5 - 7? | He is standing still. In a distance vs time graph, a horizontal line means, the object is not moving. |

If a car is driving around a track, can it have a constant speed AND a changing velocity? | Yes! The velocity would be changing because it includes both speed AND direction, and the vehicle's direction would change. |

Describe the person on the train in the Frame of Reference slide from two points of view. | The person on the train experiences herself as standing still. To the person on the ground, she is moving rapidly away. |

Created by:
judi829