Part $1(2$ points each$)$

Name:

$q,$ the forces $F_1,F_2,F_3$

A$.F_1=F_2=F_3=F_4$

$q,$ B$.F_1>F_2=F_3=F_4$

$q,$ C$.F_1>F_3=F_4>F_2$

$q,$ D$.F_1>F_3>F_4>F_2$

$q,$ E$.F_1>F_4>F_3>F_2$

$1\mathrm{.}2$: The four bars are attached to the wall, are made of the same material, have equal lengths and are loaded by an identical force at the free end. What can be said about the displacements $u_{\text{I}},u_{II},u_{\text{I}\text{I}\text{I}}$ and $u_{IV}$ where the loads are applied?

$q,$ A$.q,u_{\text{I}}>u_{II}>u_{\text{I}\text{I}\text{I}}>u_{IV}q,q,u_{\text{I}}=u_{II}>u_{\text{I}\text{I}\text{I}}=u_{IV}q,q,q,q,q,q,q,u_{\text{I}}$

$1\mathrm{.}3$: A bar $is$ fixed $to$ a support $at$ the left and loaded $as$ shown. $As$ the load $is$ increased gradually until failure, failure $of$ the bar:

$q,A.$ Most likely initiates $at$ the left end $of$ the bar

$q,B.$ Most likely initiates halfway along the length $of$ the bar

$q,C.$ Most likely initiates $at$ the right end $of$ the bar

$q,D.Is$ equally likely $to$ initiate $at$ all locations along the bar

$q,E.$ Cannot occur without also being loaded axially $in$ tension.

$1\mathrm{.}4$: Describe the difference between normal and shear stress

$1\mathrm{.}5$: Finish the sentence: A positive moment $isq,u_{\text{I}}=u_{II}$

$q,D.u_{\text{I}}=u_{II}>u_{\text{I}\text{I}\text{I}}=u_{IV}$

$q,E.u_{\text{I}}$

$1\mathrm{.}3$: A bar $is$ fixed $to$ a support $at$ the left and loaded $as$ shown. $As$ the load $is$ increased gradually until failure, failure $of$ the bar:

$q,A.$ Most likely initiates $at$ the left end $of$ the bar

$q,B.$ Most likely initiates halfway along the length $of$ the bar

$q,C.$ Most likely initiates $at$ the right end $of$ the bar

$q,D.Is$ equally likely $to$ initiate $at$ all locations along the bar

$q,E.$ Cannot occur without also being loaded axially $in$ tension.

$1\mathrm{.}4$: Describe the difference between normal and shear stress

$1\mathrm{.}5$: Finish the sentence: A positive moment $isq,u_{\text{I}}$

$q,B.u_{\text{I}}>u_{II}>u_{\text{I}\text{I}\text{I}}>u_{IV}$

$q,C.u_{\text{I}}=u_{II}$

$q,D.u_{\text{I}}=u_{II}>u_{\text{I}\text{I}\text{I}}=u_{IV}$

$q,E.u_{\text{I}}$

$1\mathrm{.}3$: A bar $is$ fixed $to$ a support $at$ the left and loaded $as$ shown. $As$ the load $is$ increased gradually until failure, failure $of$ the bar:

$q,A.$ Most likely initiates $at$ the left end $of$ the bar

$q,B.$ Most likely initiates halfway along the length $of$ the bar

$q,C.$ Most likely initiates $at$ the right end $of$ the bar

$q,D.Is$ equally likely $to$ initiate $at$ all locations along the bar

$q,E.$ Cannot occur without also being loaded axially $in$ tension.

$1\mathrm{.}4$: Describe the difference between normal and shear stress

$1\mathrm{.}5$: Finish the sentence: A positive moment $isq,$