3. Can there be forces acting on an object at rest? Explain why or why not.

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.

Answer fast for brainliest! < 3 what type of image is formed by a reflecting telescope? a reduced virtual image a reduced real image an enlarged real image an enlarged virtual image

Un satélite artificial de un planeta x tiene un periodo de 8 horas y está colocado a una distancia de 50000 km del centro del planeta. a) ¿cuál es la masa mx del plaeta? b) ¿cuál es el valor de la aceleración de la gravedad del planeta a la distancia en la que está colocado el satélite? c) ¿cuál es la velocidad orbital del satélite? d) si la masa ms del satélite es de 200 kg ¿cuál es su energía de enlace?