A 34 kg child on a swing 6,9 meters long is released from rest when the swing supports make an angle of 38,9 degrees with the vertical.

A 34 kg child on a swing 6,9 meters long is released from rest when the swing supports make an angle of 38,9 degrees with the vertical. Neglecting friction, find the child's speed (m/s) at the lowest position to two decimal places. Use 9,8 m/s^2 for the acceleration due to gravity.