Problem $4--$ make note that you will revisit this problem in Checkpoint $1.$

The figure below shows a hand$-$crank with static vertical load applied to the handle.

$($a$)$ Copy the drawing and mark the location of highest bending stress. Make a three$-$dimensional Mohr circle representation of

the stresses at this point. $($Neglect stress concentration.$)$

$($b$)$ Mark on the drawing the location of highest combined torsional and transverse shear stress. Make a three$-$dimensional

Mohr circle representation of the stresses at this point, again neglecting stress concentration.