183_notes:static_eq

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision		 Previous revision
183_notes:static_eq [2021/05/08 19:00] – [Why torque matters] stumptyl183_notes:static_eq [2026/08/25 19:16] (current) – caballero
Line 1: Line 1:
-Section 5.4 and 11.5 in Matter and Interactions (4th edition) +Section 5.4 and 11.5 in Matter and Interactions (4th edition)
  
 ===== Static Equilibrium ===== ===== Static Equilibrium =====
Line 5: Line 5:
 While you are beginning to learn about [[183_notes:torque|how objects rotate]], it's worth taking an aside to discuss how objects remain still. You have already begun this work, when you read about [[183_notes:freebodydiagrams|Free Body Diagrams]] and worked with [[183_notes:youngs_modulus|Young's Modulus]]. In both those cases, you read that an object at rest will remain at rest ([[183_notes:momentum_principle|it won't change its momentum]]) as long as the net force acting on the object is zero. It turns out that isn't the complete story. **In these notes, you will read about static equilibrium, how the concept of torque plays a key role in defining static equilibrium, and how we analyze static equilibrium situations.** While you are beginning to learn about [[183_notes:torque|how objects rotate]], it's worth taking an aside to discuss how objects remain still. You have already begun this work, when you read about [[183_notes:freebodydiagrams|Free Body Diagrams]] and worked with [[183_notes:youngs_modulus|Young's Modulus]]. In both those cases, you read that an object at rest will remain at rest ([[183_notes:momentum_principle|it won't change its momentum]]) as long as the net force acting on the object is zero. It turns out that isn't the complete story. **In these notes, you will read about static equilibrium, how the concept of torque plays a key role in defining static equilibrium, and how we analyze static equilibrium situations.**
  
-==== Lecture Video ===== 
  
-{{youtube>RzA8uywxjzc?large}}+ 
  
 ===== Defining Static Equilibrium ===== ===== Defining Static Equilibrium =====
Line 24: Line 24:
 $$\sum F_x = 0 \qquad \sum F_y = 0$$ $$\sum F_x = 0 \qquad \sum F_y = 0$$
  
-If the sum of all the forces is zero then static equilibrium is possible but **not** guaranteed.+//If the sum of all the forces is zero then static equilibrium is possible but **not** guaranteed.//
  
-[{{ 183_notes:statics_bar.png?250|A bar with two identically sized forces acting on it.}}]+[{{ 183_notes:week12_staticpivotforces.png?350|A bar with two identically sized forces acting on it.}}]
  
 ==== Why Torque Matters ==== ==== Why Torque Matters ====
  • 183_notes/static_eq.1620500429.txt.gz
  • Last modified: 2021/05/08 19:00
  • by stumptyl