An isolated rail car originally moving with speed v on a straight frictionless, level track contains a large amount of sand. A release valve on the bottom of the car malfunctions, and sand begins to pour out straight down relative to the rail car. a.) is momentum conserved in this process? A) the momentum of the rail car alone is conserved B) the momentum of the rail car + sand remaining inside and outside the rail car is conserved C) The momentum of the rail car + all of the sand, both inside and outside the rail car is conserved. D) None of three previous system have momentum conservationb) What happens to the speed of the rail car as the sand pours out? A) the car begins to roll faster B) Car maintains the same speed C) The car begins to slow down D) The problem cannot be solved

Shabaz Qureshi , 8 Years ago

Grade 12