A freight car of mass M contains a mass of sand "m". At t=0 a constant horizontal force F is applied in the direction of rolling and at the same time a port in the bottom is opened to let the sand flow out at constant rate dm/dt.
Find the speed of the freight car when all the sand is gone. Assume the freight car is at rest at t=0© BrainMass Inc. brainmass.com March 4, 2021, 6:02 pm ad1c9bdddf
We can start w/ Newton's law F=ma
But in this case "m" is the mass of the car and the sand
We should write this as...
The mass of the sand lost is ...
The solution includes all the formulas with explanations in solving the problem.