By the conclusion of this chapter, you should be able to:
- Synthesize the concepts of motion and gravitation to explain planetary orbits.
- Describe how and why objects must achieve a certain speed to go into orbit.
- Explain how tidal forces are caused by gravity.
- Illustrate how the relationship between Earth, the Moon, and the Sun causes tides on Earth.
Prepare and Assess
- Newton's Laws and Universal Gravitation
- Elliptical Orbits
- Tides and the Moon
- 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.
- 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.
- 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.
- Tidal Bulge Simulation
Shows how the Sun, the Moon, and Earth’s rotation combine to create tides.
Reassess and Apply
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