The fulcrum of a uniform 20-kg seesaw that is 4.0 m long is located 2.5 m from one end. A 34-kg child sits on?

Question

Determine the mass a person at the other end would have to be in order to balance the seesaw.

Answer 1

Assuming the 34 kg child sits on one end of the seesaw and a person of mass m kg sits on the other end, the sum of the torque about the fulcrum must be equal to 0.
(2)(0.5) + 34(2.5) - m(4-2.5) = 0
m = (88)/1.5 = 176/3 kg

Answer 2

Seesaw Fulcrum

Answer 3

MechEng had a few typos.
its (20*)(0.5) + 34(2.5) - m(4-2.5) = 0
m = (95*)/1.5 = 63.33kg