SeeSaw - multiplying signed numbers

[i][b]newtons[/b][/i] are a measure of [i][b]force[/b][/i], i.e., push or pull [[size=100][size=85][i][b]set the force by dragging the BLACK dot[/b][/i][/size][/size]][br][br][i][b]meters[/b][/i] are a measure of [b]distance [/b][[i][size=85][b]set the distance by dragging the WHITE dot[/b][/size][/i]][br][br][i][b]Torque[/b][/i] is a measure of [i][b]"twist"[/b][/i] and is measured in [i][b]newton.meters[br][br][/b][/i]How might you use this applet to help students struggling with the multiplication of signed numbers?
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