Particle Dynamics: Laws of Motion
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Questions and Answers

What is the definition of force in physics?

A pull or push that makes an object to accelerate.

What are the three components that completely define a force?

Direction, point of application, and magnitude or strength.

What is the unit of measurement for force in the international system (S.I.)?

Newton (N).

How does a body subjected to many forces, which cancel each other, behave?

<p>It will not accelerate.</p> Signup and view all the answers

What are the two types of forces mentioned in the text?

<p>Contact forces and non-contact forces.</p> Signup and view all the answers

What is the net effect of all involved pushes and pulls on a body?

<p>The net effect of all involved pushes and pulls is what matters in determining if the body will accelerate or not.</p> Signup and view all the answers

What is the concept of force used by people, and how does it differ from the one used in physics?

<p>The concept of force used by people does not necessarily have the same meaning as the one used in physics.</p> Signup and view all the answers

What is the precise definition of a force in physics?

<p>A pull or push that makes an object to accelerate.</p> Signup and view all the answers

What happens to a body if it is subjected to many forces that cancel each other?

<p>The body will not accelerate.</p> Signup and view all the answers

What are the three components that define a force in physics?

<p>Direction, point of application, and magnitude or strength.</p> Signup and view all the answers

What is the focus of the present chapter?

<p>Examining the cause of motion and the change of state of motion</p> Signup and view all the answers

When does classical dynamics hold?

<p>When the speeds involved in the motion are negligible compared to the speed of light</p> Signup and view all the answers

What happens if the speeds involved in the motion are not negligible compared to the speed of light?

<p>Relativistic considerations have to be taken into account</p> Signup and view all the answers

In what scale does classical mechanics fail in describing interacting particles?

<p>Atomic scale</p> Signup and view all the answers

What led to the definition of acceleration?

<p>The rate change of velocity</p> Signup and view all the answers

What concept is the present chapter focused on?

<p>Dynamics</p> Signup and view all the answers

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