**1. The problem statement, all variables and given/known data**

Sand is being poured onto a conveyor belt at the rate of 2kgs

^{-1}. Find the force required to move the belt at an acceleration of 3ms

^{-2}. Given the sand is not dumped off the belt at any point and the mass of the conveyor is negligible.

**2. Relevant equations**

F=ma=dP/dt

F-ma+v(dm/dt)=0

Conservation of momentum (:uhh:)

**3. The attempt at a solution**

I’m really stuck. Have I considered the correct equations? dm/dt and dv/dt are given. With only these two I can’t find a place to start. Or maybe I’m missing something simple and common which makes this opaque for me. Thanks for the help!

http://ift.tt/1iL7kpz