All changes saved 17. Answer the question below. Use the rubric in the materials for help if needed.
m
A rock with a mass of 2 kg is falling from a cliff. At one point as it is falling, its velocity is 10 -. At this same point, its
potential energy is 300 J. What is the mechanical energy of the rock? Describe how to determine this energy. Use
details to support your answer.
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Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.