Balanced Moments and Stability
Are the moments equal?
If anticlockwise moments are equal to clockwise moments the object won't turn
E.g. If your younger brother weighs 300N and sits 2m from the pivot of a seesaw and you weigh 700N where should you sit to balance the seesaw?
Anticlockwise moments = Clockwise moments
300 x 2 = 700 x y