11:39 09 MM it alll 70% X Chapter 8 Homework - PHY.. . . . webassign.net 18. [-/2.63 Points] DETAILS SERCP11 8.5.P.059. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 1.90 kg solid, uniform ball of radius 0.200 m is released from rest at point A in the figure below, its center of gravity a distance of 1.90 m above the ground. The ball rolls without slipping to the bottom of an incline and back up to point B where it is launched vertically into the air. The ball then rises to its maximum height hmax at point C. HINT v = 0 C 1.90 m hmax B 0.450 m (a) At point B, find the ball's translational speed V (in m/s). m/s (b) At point B, find the ball's rotational speed Cug (in rad/s). rad/s (c) At point C, find the ball's rotational speed cc (in rad/s). rad/s (d) At point C, find the maximum height hmax of the ball's center of gravity (in m). m Need Help? Read It Watch It 19. [-/2.66 Points] DETAILS SERCP11 8.A.P.085. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Many aspects of a gymnast's motion can be modeled by representing the gymnast by four segments consisting of arms, torso (including the head), thighs, and lower legs, as in the figure below Thigh Arm Leg 60 60 84 Torso a b In the figure, (b) shows arrows of lengths / locating the center of gravity of each segment. Use the data below and the coordinate system shown in figure (b) to locate the center of gravity of the gymnast shown in figure (a). Masses for the arms, thighs, and legs include both appendages. (Enter your answers in m, to at least three significant figures.) Segment Mass (kg) Length (m) ca (m) Arms 6.81 0.548 0.242 Torso 33.6 0.609 0.337 Thighs 14.1 0.370 0.153 Legs 7.58 0.350 0.227 HINT X cq m y cq m III O <