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# Gravity and Space

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Question | Answer |
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What is the Universal Law of Gravitation? Also what is the equation that goes along with it? | Equation: Fg=G m1m2/r2 The Law of Universal Gravitation explains that gravitational force decreases with distance.That the greater an object's mass, the greater its gravitational force. |

Why doesn't the moon hit the earth even though it is falling toward it? | The earth acts like a centripetal force, pulling the motion of the moon into a circle. |

What is centripetal force? | A centripetal force is a force is a force that makes a body follow a curved path. |

Explain how does the Universal Law of Gravitation effect all objects? | Because all objects attract each other. Each object exerts its own gravitational pull. |

use the equation of the Law of Universal Gravitation and explain how gravity changes with distance | Determine the force of gravitational attraction between the earth (m=5.98 x 10^24 kg) and a 100-kg football player if the player is standing at the earth's surface (sea level), a distance of 6.38 x 10^6 m from each earth's center. |

describe and then compare and contrast rotation and revolution | Revolution is the motion of one body around another Rotation is the circular movement of an object around the center it helps us keep time. |