1. The problem statement, all variables and given/known data A platform is supported on a piston by compressed air in a cylinder. The mass of the platform and equipment being lifted is 1100kg. The pressure needed to support this mass is 800kPa, and it rests initially at a height of 0.5m. The pressure supply is closed so that no gas enters or leaves the cylinder. One of the pieces of equipment with a mass of 50kg is moved o the platform. The entire system is at room temperature (300K) (a) What is the new position of the platform? (b) What is its maximum velocity? 2. Relevant equations W=PdV PV=nRT 3. The attempt at a solution I'm having trouble trying to find an equation that relates mass and height, that can also be related to pressure. There is no radius given, so I do not know how to find the volume of the ccylinder. Also, I am wondering what "no gas enters or leaves the cylinder" means in terms of pressure/temperature etc.