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4. Physics and Natural Laws

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3. Sir Isaac Newton

Sir Isaac Newton (1643 - 1727) was an English scientist. His discoveries and theories in "nature's laws" lead to Newtonian Physics, and his famous laws, including

  • The Law of Inertia
  • The Universal Law of Gravitation
  • The Law of Motion and Acceleration
  • The Law of Reciprocal Action

He was also the discoverer of Calculus. Without his laws and discoveries, the automobile might never have been invented!

The Law of Inertia (an object in motion, remains in motion, in a straight line, at a constant speed, until acted upon by an unbalanced force), is what keeps a car going straight down the highway, with minimal steering effort.

The Law of Gravitation (one object attracts another, via a straight line, drawn between the objects' center. The larger the mass the stronger the attraction) is why cars slow down on a hill (moving away from the center of the earth) and why roads are "banked" in curves, to keep the car on the roadway.

Physics is important to the wise driver, because it explains the limits of a vehicle's capabilities, safety, and operation. These are "Mother Nature's Laws," and she doesn't need police and courts to enforce them. A violation of her laws bring swift and sure punishment!

Law of Inertia:

An object in motion, will tend to remain in motion, in a straight line and at a constant speed, unless it is acted upon by an outside force.

How do the laws of physics impact my driving?


Lesson Summary


  

Lesson 4 Quiz


You will now answer 5 questions to test what you learned during this lesson. You must answer all questions correctly to receive completion credit for this lesson. You may answer the questions as many times as necessary to get them right.

You should review the lesson material if you don't do well on the quiz.

  1. Gravity:


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  2. According to the formula for stopping distance, how many feet will it take you to stop, from 60 mph?


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  3. The primary factor in decreasing the Kinetic Energy of an object is to:


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  4. Centrifugal force:


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  5. The best way to maximize the traction of your tires is to:


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