- #1

mikefitz

- 155

- 0

*A large sponge has forces of magnitude 17 N applied in opposite directions to two opposite faces of area 43 cm2 (see the figure below ). The thickness of the sponge (L is ")3 cm. The deformation angle (g is ")8.4°. (a) What is delta x? (b) What is the shear modulus of the sponge?*

delta x = 4.43 mm

stress = 17N/430mm = .03953N/mm^2

strain = delta L/L, 4.43/30= .1476

shear modulus = stress/strain

=.03953/.1476=.28 Pa?

what did I do wrong?