Figure 2.1 shows an apparatus used to rehabilitate the elbow for a variety of medical conditions. The apparatus consists of a cylindrical bar with a track in which a slider can move. The bar is strapped and fixed on the patient's body while the hand is strapped on the slider. (a) Describe and sketch the apparatus as a four-bar mechanism assuming that the shoulder joint, the elbow joint, the lower and upper arms are part of the mechanism. (b) Assign reasonable lengths to the links of the mechanism you have described in part (a); calculate the velocities of the lower and upper arms when the slider is at the middle of the track and going downwards at a speed of 0.2 m/s. Cylindrical bar Straps, Slider Figure 2.1 In all your answers, state and justify your assumptions and comment on your working. 30% of the marks will be assigned for the quality of your assumptions, comments and presentation of your solutions.

Figure 2.1 shows an apparatus used to rehabilitate the elbow for a variety of medical conditions. The apparatus consists of a cylindrical bar with a track in which a slider can move. The bar is strapped and fixed on the patient's body while the hand is strapped on the slider. (a) Describe and sketch the apparatus as a four-bar mechanism assuming that the shoulder joint, the elbow joint, the lower and upper arms are part of the mechanism. (b) Assign reasonable lengths to the links of the mechanism you have described in part (a); calculate the velocities of the lower and upper arms when the slider is at the middle of the track and going downwards at a speed of 0.2 m/s. Cylindrical bar Straps, Slider Figure 2.1 In all your answers, state and justify your assumptions and comment on your working. 30% of the marks will be assigned for the quality of your assumptions, comments and presentation of your solutions.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter10: Virtual Work And Potential Energy

Section: Chapter Questions

Problem 10.62P: The bar ABC is supported by three identical, ideal springs. Note that the springs are always...

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