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# Gravity and Orbits

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

What is a change in velocity? | Acceleration |

What are three different ways you can accelerate in a car? | Speed up, slow down, change direction |

What is velocity | speed in a direction |

What is the acceleration of gravity on Earth? | 9.8 m/s/s |

How is velocity labeled? | m/s |

How is acceleration labeled? | m/s/s |

How is distance labeled? | m |

When is something considered a projectile? | when its only under the force of gravity and air resistance is negligible |

Why does a projectile have horizontal motion? | inertia |

If a ball is dropped off the table at the same time one is rolled off a table, and they reach the edge of the table and fall at the same time, what will happen? | they will drop at the same time |

Why do things appear weightless as they orbit the Earth? | They are in free-fall |

How much less does someone weigh in orbit than on the Earth? | 10-15% less |

If a cannon is shot on Mars and on Jupiter, where will the cannon ball drop to the ground first? | Jupiter |

What increases gravitational force? | Increasing mass or decreasing distance towards the object with the gravitational force |

What were the names of Kepler's three laws of planetary motion? | 1st-Ellipses 2nd-Equal Areas 3rd-Harmonies |

Which of Kepler's Laws describes the shape of a planet's orbit? | 1st-Law of Ellipses |

Which of Kepler's Laws describes how the orbit shape is broken up into equal parts and the planet moves through those parts at equal times? | 2nd-Equal Areas |

Which of Kepler's Laws describes the mathematical ratio of the planet's radius and their orbital period? | 3rd-Harmonies |

Which planetary model has the Sun in the center? | heliocentric |

Which planetary model has the Earth in the center? | geocenteric |

What is the name of the shape of the orbit of the planets? | ellipse |

When does a planet speed up? | When it is closer to the star it is orbiting |

What are the focal points of an ellipse called? | foci |

Which planet would have the longest orbital period according to Kepler's Third Law Earth, Neptune, Jupiter? | Neptune-furthest away from the Sun of the three |

What keeps a planet in motion in its orbit? | inertia |

What force pushes a plane forward? | thrust |

What force is caused by air particles as an object moves horizontally? | drag |

What force is causing a plane to rise? | lift |

What does Bernoulli's Principle state? | as an object moves faster in an area, the pressure in that area decreases-in a plane this causes the plane to rise to that area of lower pressure |

What is Newton's first law? | An object in motion (or rest) remains in motion (or rest), unless an unbalanced net force acts on it |

What is Newton's 2nd law? | An objects force is proportional to its mass and acceleration. Meaning f=mxa |

What is Newton's 3rd law? | Every action has an equal and opposite reaction |

In what ways would your world be different if gravitational force were higher or lower? | (This is your essay question...think about it) |

How do physical principles like gravity, inertia, laws of motion, or Bernoulli's Principle allow for our current technology? | (this is your essay question....think about it) |

T/F--As an object falls it is accelerated by gravity | T |

T/F-As an object falls air resistance works against gravity | T |

T/F-As an object gets larger its gravitational force increases | T |

T/F-If your remove all particles an object will not meet air resistance as it falls. | T |

T/F-Jupiter would have the most gravitational attraction of all the planets. | T |

T/F-We weigh different weights on different planets because of their different gravitational attraction. | T |

T/F-There is no atmosphere on the moon, but there is gravitational attraction | T |

T/F-Satellites slow down over time because of atmospheric drag. | T |

T/F-An object in orbit is really falling around that object. | T |

T/F-If an orbiting object goes too fast, it can leave the orbit. | T |

T/F-If an orbiting object goes to slow, it can fall back into the object it is orbiting. | T |

T/F-The mass of the satellite does not affect its orbit around the Earth. | T |

T/F-The moon and the Earth have an equal pull of gravitational force on one another. | T |

T/F-There spots on Earth where gravitational force is different. | T |

T/F-If lift is greater than gravity, an object will rise. | T |

T/F-If thrust is greater than drag, the object will accelerate forward. | T |

T/F-If thrust and drag is equal, there will be no acceleration. | T |

T/F-If lift and gravity are equal, there will be no vertical movement | T |

How many cm are in a m? | 100 |

How many mm are in a cm? | 10 |

What is a dependent variable? | Variable responding to the independent variable. |

What is the independent variable? | The variable that is being tested and changed in the experiment. |

What are the constants of an experiment? | Variables that must all be checked to remain the same in an experiment. |

Created by:
senecairishscience