Chapter $4$ HW $1$

$4-9$

FIGURE P$4-9$ Shape of a slug for Problem $4-9.$

$4-9.$ Determine the force required to punch a slug having the shape shown in Figure P$4-9$ from a sheet of aluminum $3003-$H$18$ having a thickness of $0\mathrm{.}194$ in$.$

$4.$ Chapter $4$ HW $2$

$4-56$

$4-56.$ Determine the stress that would result in a $1\frac{1}{2}in.$ Schedule $40$ steel pipe if a plumber applies a force of $80$ lb at the end of a wrench handle $18in.$ long.