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--- book:chap3:newton [2021/10/07 05:15] – jv
+++ book:chap3:newton [2022/04/01 19:49] (current) – jv
@@ Line 1: / Line 1: @@
-====== 3. Newton's laws ======
+====== 3. Newton's Laws ======
-The PDF file of the chapter is available  {{ book:chap3:2021_jv_unil_mechanics_chap03.pdf |here}}.
+In [[book:chap2:forcestorques|Chapter 2]] we explored how several forces that act on a body can be subsumed into a net total force and torque. The body stays in rest, say at position $\mathbf q_0$, when the net force and torque vanish. Now we explore how the forces induce motion
+and how the position of the body evolves in time, $\mathbf q(t)$,
+when it is prepared with an initial condition $\mathbf q(t_0) = \mathbf q_0$
+at the initial time $t_0$.
-I am curious to see your questions, remarks and suggestions:
-~~DISCUSSION~~
+<WRAP 400px center>
+{{Falling_cat_1894.jpg}}
+<wrap lo> Photographs of a Tumbling Cat. [[https://doi.org/10.1038/051080a0 | Nature 51, 80–81 (1894)]]
+</wrap>
+</WRAP>
+At the end of this chapter we will be able to discuss the likelihood for injuries in different types of accidents, be it men or cat or mice.
+Why do the cats go away unharmed in most cases when they fall from a balcony,
+while an old professor should definitely avoid such a fall.
+As a worked example we will discuss [[https://www.grc.nasa.gov/WWW/K-12/rocket/rktbot.html | water rockets]].\\
+-----
+  * [[  3.1 Motivation and outline | 3.1 Motivation and outline: What is causing motion?]]
+  * [[  3.2 Time derivatives of vectors | 3.2 Time derivatives of vectors ]]
+  * [[  3.3 Newton’s axioms and equations of motion (EOM) | 3.3 Newton’s axioms and equations of motion (EOM)]]
+  * [[  3.4 Constants of motion (CM) | 3.4 Constants of motion (CM)]]
+  * [[  3.5 Worked example Flight of an Earth-bound rocket | 3.5 Worked example: Flight of an Earth-bound rocket]]
+  * [[  3.6 Problems | 3.6 Problems]]
+  * [[  3.7 Further reading | 3.7 Further reading]]
+The PDF file of the chapter is available   {{ book:chap3:2021_jv_unil_mechanics_chap03.pdf |here}}.
+~~DISCUSSION|Questions, Remarks, and Suggestions~~