Calculate the actual force (lb) output of the cylinder based on the amount the spring was compressed. Compare it with the theoretical force of the cylinder and get the percentage error. report only the percentage error using the formula: (F(theoretical)-F(actual))*100/F(theoretical) Take L = 9.8 the uncompressed length of spring, L1=4.7 in the compressed length, k = 335 spring constant, d= 4.6 in piston diameter, r = 0.73 in rod diameter, and p = 204 psi.