Question

The diatortion of the earth's crust is an example of shear on a large scale. A particular rock has a shear modulus of 1.5 time 10 raised to 10. What shear stress is appliad when a 10km layer of rock is sheared a distance of 5 m.?

Answer 1

$$1.55\cdot10^{10}=\frac{10000\sigma}{5}\\\sigma=7.75\cdot10^{6}\ Pa$$