A 38.0-kg child swings in a swing supported by two chains, each 2.96 m long. The tension in each chain at the lowest point is 438 N.
(a) Find the child's speed at the lowest point.
_____________m/s
(b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.)
_____________N (upward)