You hold a heavy kettlebell up in the air, at rest, with your arm inclined at a 45-degree angle. The mass of the kettlebell is 3? kg, and the mass ofyour arm is 4 kg. You can treat your arm like a uniform rod with length 1 m. The muscle that holds your arm up is {mainly} the deltoid muscle. Assume that this muscle attaches to your arm at a distance of 10 cm from the shoulder socket [the pivot] to your hand. And assume that in the present case the deltoid muscle is horizontal. See pair of gures below: I J T kg kettlebell pi mt C11: Given its direction {shown in the figure above] determine the magnitude of the deltoid force needed to maintain the kettle bell at rest. C12: Determine the magnitude {under circumstances indicated above] of the total force exerted by your shoulder on the lower end of your arm at the pivot? Hint: This force is not shown in the figure, but you can determine its components as necessary to maintain static equilibrium of the system. and fromthis you can determine its magnitude. - Getting Started: State the important information and summarize the problem. If possible, include a diagram. Note any assumptions you're making. - Devise Plan: Devise a plan of attack before diving into the solution. Break down the problem into smaller, manageable segments. Identify which physical relationships you can apply. - Execute Plan: Carry out your plan, explaining each step. The argument should be easy to follow. Articulate your thought process at each step {including roadblocks). Any variables should be clearly defined. and your diagrams should be labeled. - Evaluate Solution: lCheck each solution for reasonableness. There are many ways to justify your reasoning: check the symmetry of the solution, evaluate limiting or special cases, relate the solution to situations with known solutions, check units, use dimensional analysis, andfor check the