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.
Figures a and b describe a gymnast's motion as he swings about a bar.
In the figure, (b) shows arrows of lengths rcg 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.)
Many aspects of a gymnast's motion can be modeled by representing the gymnast by four segments...
Many aspects of a gymnast's motion can be modeled by representing the gymnast by four segments consisting of arms, torso (including the head), highs, and lower legs, as in the figure below Thigh Leg rm Torso In the figure, (b) shows arrows of lengths rca 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...
11. + -12 points SerCP10 8.P.016. 0/4 Submissions Used My Notes + Ask Your Teacher Many of the elements in horizontal-bar exercises can be modeled by representing the gymnast by four segments consisting of arms, torso (including the head), thighs, and lower legs, as shown in Figure b. Inertial parameters for a particular gymnast are as follows. Segment Mass(kg) Arms 6.87 Torso 34.40 Thighs 13.30 Legs 7.36 Length (m) 0.530 0.601 0.374 cg (m) 0.239 0.337 0.151 1(kg • m)...
Name 3. Gymnast. A gymnast holds onto a single bar with both hands with her arms outstretched as shown to the right. She swings around the bar in a full circle. Assume the only forces acting on her are gravity and a normal force between the bar and her hands. The gymnast's mass is 35 kg and the distance from her outstretched hands to her feet is 2.5 m. A. What is the torque on the gymnast's body around the...
When you bend over, a series of large muscles, the erector spine, pull on your spine to hold you up. (Figure 1) shows a simplified model of the spine as a rod of length L that pivots at its lower end. In this model, the center of gravity of the 360N weight of the upper torso is at the center of the spine. The 170N weight of the head and arms acts at the top of the spine. The erector...
PROBLEM 2 Knee Extension - The angular motion of the lower leg about the knee joint, and the forces and torques produced by the muscles crossing the knee joint during knee flexions and extensions have been investigated by a number of researchers utilizing different experimental techniques. One of these techniques is discussed here. Consider the person illustrated in Fig. 10.12. The test subject is sitting on a table, with the back placed against a back rest and the lower legs...