1. The two children shown in the gure are balanced on a 10.0 kg seesaw. The rst child has a mass of 22.0 kg and sits 1.80 m from the pivot. The center of mass of the seesaw 0.150 m to the left of the pivot (on the side of the lighter child). (Zpts) (a) If the second child has a mass of 30.0 kg, how far is she from the pivot? (b) What is 39, the supporting force exerted by the pivot? 3. A 4.00 m long uniform plank of wood (mass 25.0 kg) is placed on top of two milk crates which act as support on some level ground. A 15.0 kg can of paint is placed onto the plank, 1.50 1n from one end. If the centers of the two crates are 1.00 m and 2.00 m from the center of the paint can, calculate the normal force Nldue to the crate acting on the plank? (3 pts) Paint can