Study Plan

Learning Goals

By the conclusion of this chapter, you should be able to:
  1. Synthesize the concepts of motion and gravitation to explain planetary orbits.
  2. Describe how and why objects must achieve a certain speed to go into orbit.
  3. Explain how tidal forces are caused by gravity.
  4. Illustrate how the relationship between Earth, the Moon, and the Sun causes tides on Earth.

Prepare and Assess


    1. Newton's Laws and Universal Gravitation
      Section: 4.2
    2. Elliptical Orbits
      Section: 4.2
    3. Tides and the Moon
      Section: 4.3
    1. Newton's Law of Gravity Calculator
      Allows one to calculate the force of gravity acting on a variety of masses over a range of distances.
    2. Gravity Algebra
      Shows how the force of gravity would be different if the values used in Newton’s law of universal gravitation formula are changed.
    3. Planetary Orbit Simulator
      Models the motion of a hypothetical planet that orbits the sun according to Kepler’s laws of motion. This simulator includes controls for investigating each of Kepler’s laws, and Newtonian features.
    4. Tidal Bulge Simulation
      Shows how the Sun, the Moon, and Earth’s rotation combine to create tides.

Reassess and Apply

  1. Additional comments or issues to report:

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