Juan sale a pasear en su motocicleta y mantiene una velocidad constante de 60km/h. ¿Qué distancia recorrió en un lapso de 25 segundos?

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

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.

Which system of units is used by only a small number of countries in the world, including the u. s.