Araft is made of 10 logs lashed together. each is 56cm in diameter and has a length of 6.1m. how many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 69 kg? do not neglect the weight of the logs. assume the specific gravity of wood is 0.60.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

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.

What equation is used to calculate the weight of an object on a plant ?