College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 6, Problem 22CQ
Newton's laws of motion and gravity were among the first to convincingly demonstrate the underlying simplicity and unity in nature. Many other examples have since been discovered, and we now expect to find such underlying order in complex situations. Is there proof that such order will always be found in new explorations?
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Suppose there is a correction term to Newton's law of universal gravitation
where the letters have their usual meaning and are given in SI units and, in particular, r is the separation distance between the two masses m1 and m2 and A is some new constant of nature. Find the units of this constant A.
You may have an image of Sir Isaac Newton sitting under a tree and after being hit on the head by an apple he suddenly "discovered" the Law of Universal Gravitation. In fact, the theory was a result of years’ worth of research, which in turn was based on centuries of accumulated knowledge. He is credited with determining that the following relationship is universal. The gravitational attraction between two objects varies jointly with their masses (m1 and m2) and inversely with the square of the distance (d) between them. By what percent does the force of gravitational attraction change if one mass is increased by 20%, the other mass decreased by 20%, and the separation is reduced by 25%?
What is the present scientific status of Newtonian
physics?
(a) We now know for certain that Newtonian physics is
correct.
(b) Although we cannot know for certain that
Newtonian physics is correct, no violations have ever
been discovered.
(c) Newtonian physics does not apply to very small
objects, but otherwise no violations have been
discovered.
(d) Newtonian physics does not apply to very small
objects, high-speed objects, and very strong
gravitational forces.
(e) Newtonian physics is now known to be wrong and
thus it is no longer useful in science.
Chapter 6 Solutions
College Physics
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