A school yard teeter totter with a total length of 6.0 m and a mass of 36 kg is pivoted at its center. A 19 kg child sits on one end of the teeter totter.
(a) Where should a parent push with a force of 189 N in order to hold the teeter totter level?
(b) Where should the parent push with a force of 350 N to keep the teeter totter level?