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Chapter 14

by: Jacob Edwards

Chapter 14 80218 - PHYS 1220 - 001

Jacob Edwards
GPA 3.2

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About this Document

These notes cover chapter 14 with the exclusion of elasticity since those were not went over in class.
Physics with Calculus I
Lih-sin The
Class Notes
25 ?




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This 2 page Class Notes was uploaded by Jacob Edwards on Monday April 18, 2016. The Class Notes belongs to 80218 - PHYS 1220 - 001 at Clemson University taught by Lih-sin The in Winter 2016. Since its upload, it has received 20 views. For similar materials see Physics with Calculus I in Physics 2 at Clemson University.


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Date Created: 04/18/16
Chapter 14 An object at rest is in static equilibrium. Equilibrium is when an object has constant translational and rotational momenta. Stable static equilibrium is when after being released forces return the object back to its equilibrium position. An example of this is a marble at the bottom of a bowl. Unstable static equilibrium is when after being released the object is farther from its equilibrium position. This is like releasing a marble at the top of a bowl. Neutral static equilibrium would be a marble released on a level surface. Two conditions need to be met for an object to be at equilibrium: dp 1. Ftot dt Ftot dL 2. τtotdt τtot Using these conditions is how to solve the problems where people are carrying a board and to calculate the force applied on the board Cross Product: To do cross product the simplest way is to use matices. If r=1i +1j and F=2i+3j the r x F= i j k 1 1 0 =i1 0 − j1 0+k 1 1 3 0 2 0 2 3 2 3 0 The discriminate of each matrix is found. (ac-bd) So the answer to this problem is –k. Stress is the magnitude of force applied to an object per unit of area. The formula is: F σ= A


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