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Sagot :
Answer:
a) Newton proposed three laws to explain the motion of things.
b) bodies are in motion the kinetic moment  is preserved,
c) entropy
Explanation:
In this exercise you are asked to explain various concepts of physics
a) Newton proposed three laws to explain the motion of things.
* The first law or inertia states that a body in an inertial system (without acceleration) remains stationary or with constant velocity if the sum of the forces is zero
* The second law states that the force (interaction) is proportional to the masses and the acceleration of the bodies
    F = m a
* The third law or action and reaction, says that the forces always go in pairs, that is, if a body interacts with a body 2, and body 2 will also interact with body 1, with the same force but with the opposite direction, each force is applied to a body
b) when bodies are in motion the kinetic moment
     L = I w
it is preserved, if it does not interact with the outside.
The quantity I called the moment of inertia is I = m r²
In this case
in the initial instant with outstretched arms
   L = I₀ w₀
in the final moment. By shrinking your arms
  [tex]L_{f}[/tex] = I_{f} w_{f}
as the body does not interact with another
   L₀ = L_{f}
   I₀ w₀ = I_{f} w_{f}
   w_{f} = [tex]\frac{I_{o} }{I_{f} }[/tex]  w₀
we substitute
   w_{f} = \frac{r_{o} }{r_{f} }^2 w₀
as the distance of the arms extended is greater than when they are retracted (râ‚€> Â [tex]r_{f}[/tex]), the final angle speed increases
c) This is an application of the concept of entropy that establishes that disorder is the most probable state of a system, which is why the cave increases its disorder or entropy over time since by not fixing things, they are increasingly dispersed
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