Two cars a and b approach each other at an intersection. car a is traveling south at 20 m/s, while car b is traveling east at 17 m/s. what is the velocity of car a as described by the passengers in car b? 1. 37 m/s, eastward2. 26 m/s, 50° south of east3. 26 m/s, 40° south of west4. 26 m/s, 40° south of east5. 26 m/s, 50° south of west

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Ways that industry and agriculture use physical properties to separate substances

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.