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  • The faster or bigger the sun or planet compared to its satellites the more gravity it will have holding those planets or satellites in orbit.

Gravity and laws of motion power point2 Gravity and laws of motion power point2 Presentation Transcript

  • Gravity and Laws of Motion
  • Sir Issac Newton 1643-1727
    • English mathematician and physicist
    • Laws of MOTION
    • 1. Law of Inertia
    • 2. Force = Mass x Acceleration
    • 3. Equal and Opposite Reaction
  • Newton’s First Law
    • 1. The first law of motion states that an object at rest will remain at rest. And an object will continue moving unless acted upon by an outside force. This law is called the Law of Inertia .
    View slide
  • NEWTON’S FIRST LAW OF MOTION
    • A body at rest or in motion will remain at rest or in uniform motion unless some outside force is applied to it.
    • Often referred to as the”law of inertia”.
    View slide
  • Newton’s Second Law
    • 2. The change in an object’s motion depends on its mass and the force acting upon it.
    • Force = Mass x Acceleration
    • Force - Push or Pull exerted on an object.
    • Mass - The amount of matter in an object.
    • Acceleration - The rate at which the speed changes.
  • NEWTON’S SECOND LAW OF MOTION
    • The change in an object’s motion depends on its mass and the force acting upon it.
    • F = ma
    • One of the most famous formulas in our world.
  • Newton’s Third Law
    • 3. With every action there is an equal and opposite reaction.
  • NEWTON'S THIRD LAW OF MOTION
    • To every action force there is an equal and opposite reaction. Sometimes called the law of momentum.
  • What is gravity?
    • Gravity – the force that pulls objects toward the center of the Earth.
    The amount of gravitational force depends upon the mass of the objects and the distance between the objects.
  • Guess your weight on Mars!
    • This website will tell you how much you would weigh if you were on any of the other planets.
    • http:// www.exploratorium.edu/ronh/weight/index.html
  • Gravity continued…
    • Law of Universal Gravitation This law states that the force of Gravity acts between all objects in the universe.
  • Who are you attracted to?? Maybe not Romantically by definitely Gravitationally! Two bodies are attracted to each other due to their mass and the distance between them.
  • Why don’t we always feel a gravitational attraction?
    • In order for a gravitational attraction to be felt the mass of one of the bodies must be very large. The earth is many times more massive than you are. You can sense the Force of Attraction.
  • Earth Orbit and Gravity
  • What forces are acting on the moon? gravity pulls it in inertia keeps it going Inertia
  • Which way did it go? Better watch out for the cops!