For the scientist (or aspiring scientist), the question of why to study science doesn't need to be answered. If you're one of the people who get science, then no explanation is required. Chances are that you already have at least some of the scientific skills necessary to pursue such a career, and the whole point of study is to gain the skills which you don't yet have.
However, for those who are not pursuing a career in the sciences, or in technology, it can frequently feel as if science courses of any stripe are a waste of your time. Courses in the physical sciences, especially, tend to be avoided at all cost, with courses in biology taking their place to fill necessary science requirements.
The argument in favor of "scientific literacy" is amply made in James Trefil's 2007 book Why Science?, focusing on arguments from civics, aesthetics, and culture to explain why a very basic understanding of scientific concepts is necessary for the non-scientist.
Sir Isaac Newton's law of universal gravitation (i.e. the law of gravity) can be restated into the form of agravitational field, which can prove to be a useful means of looking at the situation. Instead of calculating the forces between two objects every time, we instead say that an object with mass creates a gravitational field around it. The gravitational field is defined as the force of gravity at a given point divided by the mass of an object at that point, as depicted to the right.
However, for those who are not pursuing a career in the sciences, or in technology, it can frequently feel as if science courses of any stripe are a waste of your time. Courses in the physical sciences, especially, tend to be avoided at all cost, with courses in biology taking their place to fill necessary science requirements.
The argument in favor of "scientific literacy" is amply made in James Trefil's 2007 book Why Science?, focusing on arguments from civics, aesthetics, and culture to explain why a very basic understanding of scientific concepts is necessary for the non-scientist.
Sir Isaac Newton's law of universal gravitation (i.e. the law of gravity) can be restated into the form of agravitational field, which can prove to be a useful means of looking at the situation. Instead of calculating the forces between two objects every time, we instead say that an object with mass creates a gravitational field around it. The gravitational field is defined as the force of gravity at a given point divided by the mass of an object at that point, as depicted to the right.
You'll notice that here both g and Fg have arrows above them, denoting their vector nature. The source mass M is now capitalized. The r at the end of the rightmost two formulas has a carat (^) above it, which means that it is a unit vector in the direction from the source point of the mass M. Since the vector points away from the source while the force (and field) are directed toward the source, a negative is introduced to make the vectors point in the correct direction.
This equation depicts a vector field around M which is always directed toward it, with a value equal to an object's gravitational acceleration within the field. The units of the gravitational field are m/s2.
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