1. a. Jim and Gina are swinging on adjacent swings of equal length. Jim weighs about twice as much as Gina. Who takes less time to swing back and force. I got this answer, which is that they take the same time since mass doesn't affect the period in simple harmonic motion. However, I don't get part b below. b. What, if anything, will change if Jim swings while standing on the seat of his swing? I. Jim's period will decrease. II. Gina's period will decrease. III. No change in the period. I put no change, however, the answer is wrong, does anyone know why?