Quiz 1 Distribution

100  
100  94
100  94
100  94
100  94
100  93
100  93
 99  93
 99  93
 99  93
 99  92
 99  92
 98  92                
 98  91                
 97  91                
 97  91  89              
 97  91  89              
 97  91  89              
 97  91  89      79          
 96  90  87  84  79          
 96  90  87  84  76          
 95  90  86  83  75  73        
 95  90  86  81  75  72  57      38  
 95  90  85  80  75  70  56  46  34  15

Mean: 86.6, Median 91

Quiz 2 Distribution

100      89                      
 99  94  89                       
 99  94  89  84      74                
 98  94  89  83      74                
 97  94  88  83      74  67              
 97  93  88  83      73  67              
 97  91  88  82      72  67              
 96  90  88  82      72  66              
 95  90  87  81      72  65          50  46  43  28  
 95  90  86  80  77  71  65  64      50  46  43  28  
 95  90  85  80  76  71  65  60  55  50  45  42  26  19

Problem 1

Problem 2

Problem 3

Problem 4

This problem could be solved either by considering the buckling stress, or the buckling force. Both approaches are posted here.

Stress-based solution:

Force-based solution:

Problem 5