M, (g) =_ 50 m/'s 7.5 F = W = FIN M. =M, +M , M-9 X = X, - X. K= x m M. F X. X X (9) (g) (kg) (N) (cm) (cm) (m) K 0 (N/m) 0 50 19 100 25 150 30 200 37 250 42 Average force constant K. Force constant K. from the slope of the trendline in the graph % relative difference between K, and K X : Position of the spring's bottom My: Mass of the weight hanger (unstretched) X, Position of the spring's bottom M. : Mass of added slotted weights (stretched) M.: Total Mass *: Elongation of the spring W: Weight of hanger plus slotted weights K. Force constant of the spring