hi, i am doing a lab about analyzing one-dimensional collisions. There are two synthesis questions that i don't know how to even begin with. 1. How could the results of this investigation be applied to determine the mass of a sealed refuse bag on board the International Space Station? (Everything in the station is under constant free fall.) First off, i don't even understand the question. what's a 'sealed refuse bag on board the internation space station' anywayz? 2. Adjustable friction pads are available as cart accessories. How would using these pads have affected the results of the collisions in this investigation? Well, the lab design was to use frictionless carts along a level track, so i think the 'cart' on the question is talking about the one we used. So, how does friction affect 1-D collisions? hmm. i think the friction hinders the movement of the carts, therefore lowering the velocity, which even lowers the values of the cart's momentum and kinetic energy. How's that?