1. The problem statement, all variables and given/known data The distance from the spring attachment to the arch in 9 feet. The distance from the arch to the arch is 20 feet. There are three arches. So, End plate-spring to arch to arch to arch to spring-end plate. The tarp weights 750 lbs and is 60 ft by 20 ft. There are 20 springs attached to the end plates (north and south) and 60 springs on the base (east and west). Snow can accumulate at a value of 25 lb/ft^2. What are all the forces and the parameters needed to define the springs (K, X1, and X2). 2. Relevant equations F=mg F=K(X1-X2) 3. The attempt at a solution F=32.2(750)=24150 Modeling just from the arch to the spring as a single string/rope-> 24150/60=402.5 lb/ft Spring is Ra and arch is Rb, F is mg of tarp Ra+Rb=F 402.5*9/2=1811.25 = Ra=Rb So, 1811.25=K(X1-X2) This just seems bad wrong I really want to find out what my K value should be and I want the spring to be about 8 inches.