Mass Added(add Total Mass Fnom'lal(acting 0 Force of Static Fr Force of Kinetic ed to block}(kg} (block+Masses}( n the block}(N} iction(N} Friction(N} kg) 40 90 882 248 173 n 80 130 1,274 344 240 n 50 100 980 253 188 0 40 142 132 76 n 100 150 1,470 400 279 n 90 140 1,372 299 345 130 180 1,764 451 336 n 120 170 1,666 427 322 n 140 190 1,862 450 360 n 0 80 784 300 152 n 0 100 980 400 160 n 120 170 1,666 437 324