1. The problem statement, all variables and given/known data Two children of masses 45 kg and 30 kg are playing on a teeter-totter of length 4.0m and mass 30.0kg, pivoted at its centre. The heavier child sits 1.75 m from the centre of the teeter-totter that is 0.50 m from the ground. a) What torque does the teeter-totter apply to each of its sides? With this knowledge, how could you simplify any further calculations. 2. Relevant equations T=r x Fsin(theta) 3. The attempt at a solution The example says: T=rF sin (theta) T=(1.0 m)(30.0 kg)(9.8 N/kg) t-t 147 N·m I don't understand where the one metre is coming from. Can anyone help me?