A rock is projected from the edge of the top of a building with an initial velocity of 12.2

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

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.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?