A 23 kg boy sits 15 m from the axis of rotation of a seesaw

A 23 kg boy sits 1.5 m from the axis of rotation of a seesaw. At what distance from the axis of rotation must a 21 kg boy be positioned on the other side of the axis to balance the seesaw?

Solution

m₁=23

d₁=1.5

m₂=21

m₁d₁=m₂d₂

23*1.5=21*d₂

d₂=(23*1.5)/21

d₂=1.643

at the  distance of 1.64m from the axis of rotation must a 21 kg boy be positioned on the other side of the axis to balance the seesaw