C At a small power station, the generator produces alternating current at a voltage of 10KV. This must be reduced to 415 V for use in a factory
The transformer used for this purpose has a primary coil of 2000 turns. How many turns must its secondary con
have?

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.