click below

click below

Normal Size Small Size show me how

# FINAL 2: Motion

### 8th Grade Earth Science FINAL 2

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

How do you calculate the velocity of a moving object? | Velocity is speed with direction (a vector). Distance/Time |

How do you calculate the momentum of a moving object? | Momentum is a calculation of a mass traveling at a certain velocity. Mass x Velocity |

How do you calculate the acceleration of a moving object? | A change in velocity over time. final velocity - initial velocity / time |

How do you interpret the motion of an object using a graph? | -When velocity is graphed on the y-axis versus time on the x-axis, the slope of the line is the acceleration. -If distance (Y-axis) is graphed vs time (X-axis), the slope of the line equals the speed . |

How are forces created? | An accelerated mass |

What is the difference between balanced and unbalanced forces? | - Balanced forces are forces that are acting on an object that combine to equal a net force of zero. - Unbalanced forces are forces that combine to produce a net force NOT equal to zero. Results in acceleration or movement. |

What are the different types of forces? | Friction, applied force, air resistance, gravity, normal force, etc. |

How do you calculate the net force on an object? | Net Force is the combination of all the forces acting on an object. To find it, add together all the forces working on the object. |

What is Newton's 1st Law of Motion and how does it apply to real-world situations? | Inertia- the tendency for an object to stay in motion or stay at rest. Ex. pressing the break in a car and springing forward |

What is Newton's 2nd Law of Motion and how does it apply to real-world situations? | Force ~An object acted upon by a force will accelerate in the direction of the force. ~ Ex. a person falling out of a plane is falling in the direction of the force, gravity, downward |

What is Newton's 3rd Law of Motion and how does it apply to real-world situations? | Action/Reaction For every action (force) there is an equal reaction (force) in the opposite direction. forces act in pairs EX. When you push on the wall, the wall pushes back on you with an equal amount of force. this is how rockets work |