A liquid has a volume of 100 cm and a mass of 85g. The density of water is 1.0g/cm?
How does the density of the liquid compare with the density of water?
A
Its density is higher than that of water.
Its density is lower than that of water.
B
с
Its density is the same as that of water.
D
It is impossible to say with only this data.
А
B
ОО
С
D

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.