physics4

Unit Four: Newton's First Law
Objectives

4.1 Aristotle on Motion

     1. Describe Aristotle's concepts of natural and violent motion.

4.2 Copernicus and the Moving Earth

    2 Describe Copernicus' idea about the earth's motion.

4.3 Galileo on Motion

    3. Describe Galileo's contribution to the science of motion.

4.4 Newton's Law of Inertia

    4. Define inertia.

     5. State Newton's first law of motion and explain what it means.

4.5 Mass - A Measure of Inertia

    6. Explain the difference between mass, volume, and weight.

     7. State the difference between the kilogram and the Newton as units of
          measurement.

4.6 Net Force

    8. Define net force.

4.7 Equilibrium - When Net Force Equals Zero

    9. Describe an object in equilibrium.

4.8 Vector Addition of Forces

     10. Explain why a clothesline or wire that can easily support an object
           when strung vertically may break when strung horizontally and
           supporting the same object.

     11. For an object on a slope, resolve its weight into a component that
            causes acceleration along the slope and a component that presses it
            against the slope.

4.9 The Moving Earth Again

     12. Explain how something that is not connected to the ground is able
            to keep up with the moving Earth.

                                            Misconceptions
                     Note: The following statements are FALSE!!!

     1. Constant motion requires a force.
     2. Even if no force acts on a moving object, it will eventually stop.
     3. Inertia is a force.
     4. Weight and mass are two names for the same thing.
     5. Mass and volume are two names for the same thing.
     6. The tension in a string that supports a load is generally equal to the
          weight of the load.

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