9. Two bowling balls are at rest on top of a uniform wooden plank with their centers of mass located as in Figure P8.9. The plank has a mass of 5.00 kg and is 1.00 m long. Find the hori- zontal distance from the left end of the plank to the center of mass of the plank-bowling balls system. -0.850 m 10.300 m 3.75 kg 15.50 kg B 5.00 kg 1.00 m- Figure P8.9