forces - balanced moments

Question 1

seesaw scenario

Answer 1

pivot is in the centre
two people applying force on either end
right person= applying clockwise moment
left person= anti-clockwise moment

Question 2

Because the seesaw is balanced, the clockwise moment….

Answer 2

must be equal to the anti-clockwise moment

Question 3

why do certain objects topple?

Answer 3

weight if block acts directly down from centre of mass. if at an angle, the line of action of the weight lies outside the base of the object. now a resultant moment (unbalanced) acting on the block causing it to topple