A 47 kg child is sitting 1.9 meters away from the fulcrum of a seesaw. Where would a 63 kg child need to sit in order to balance the seesaw, in meters? Round to the first decimal place.

Question

A 47 kg child is sitting 1.9 meters away from the fulcrum of a seesaw. Where would a 63 kg child need to sit in order to balance the seesaw, in meters?

Round to the first decimal place.

Answer 1

Well moment of force vertically (mass x g x distance from fulcrum in meters) must be the same on both sides of the fulcrum to balance.

So if d is the required distance (g = 9.81 m/s/s)

47 x 9.81 x 1.9 = 63 x 9.81 x d

Now you can find d