1. Present a brief explanation of how, by calculating forces and torques in a physical system such as the human body, it is possible to deduce the best way to lift an object without injuring yourself. Include at least one relevant mathematical formula in presentation. 2. Present a brief explanation of the second law of thermodynamics, and using the human body as an example, what it implies about the energy input and output of any physical system. Include at least one relevant mathematical formula in the presentation