Principal stresses, maximum shear stress, and theta_p are calculated and displayed.

Input Normal Stress σ_y (in Pa)

Input Shear Stress 𝜏_xy (in Pa)

1. Input any combination of non-zero shear and normal stresses. Take a screenshot of the resulting Mohr's Circle. Now change the sign of the shear stress (if it was positive, make it negative; if it was negative, make it positive). Take a screenshot of the resulting Mohr's Circle. Note the differences and similarities. Explain why these occur.

2. Create a combination of shear and normal stresses that result in a theta_p of 0 degrees.

3. Create a combination of shear and normal stresses that result in a theta_p of 90 degrees.

4. Create a combination of shear and normal stresses that result in a theta_p of -90 degrees.

## AtmosphereA simple demo of a simulation of an atmosphere. It looks quite cool, but there's not a lot you can do with it yet, and the physics isn't yet all that accurate. |

## How SpaceX land first stage boostersThe algorithms that SpaceX (probably) use to control their first stage boosters. Several animations. |

© Hugo2015. Session @sessionNumber