A BOON child is in a swing that is attached to a pair of ropes 1.90 m long. Find the gravitational potential energy of the childEarth system relative to the child's lowest position atthe following times. {a} when the ropes are horizontal {b} when the ropes make a 34.0" angle with the vertical {c} when the child is at the bottom ofthe circular arc 2. Two force vectors are given by the following : F1 = 21 + 4j + 3k and F2 = 21 - 4j + 2k A) Determine the scalar product F1. F2 B) Find the angle 0 between F, and F