11.51 - BIO Supporting a Broken Leg. A therapist tells a 74-kg patient with a broken leg that he must have his leg in a cast suspended horizontally. For minimum discomfort, the leg should be supported by a vertical strap allached at the center of mass of the leg-cast system (Fig. PIL.51). To comply with these instruc- tions, the patient consults a lable of typical mass distributions and finds that both upper legs (Ihighs) together typically account for 21.5% of body wcight and the center of mass of cach thigh is 18.0 cm from the hip joint. The patient also reads that the two lower legs (including the feet) are 14.0% of body weight, with a center of mass 69.0 cm from the hip joint. The cast has a mass of 5.50 kg, and its center of mass is 78.0 cm from the hip joint. How far from the hip joint should the supporting strap be allached to the cast? Figure PI1.51 Supporting strap Hip joint Cast

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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11.51 * BIO Supporting a Broken Leg. A therapist tells a
74-kg patient with a broken leg that he must have his leg in a cast
suspended horizontally. For minimum discomfort, the leg should
be supported by a vertical strap allachcd at the center of mass of
the leg-cast system (Fig. PI1.51). To comply with these instruc-
Lions, the patient consults a table of typical mass distributions and
finds that both upper legs (thighs) together typically account
for 21.5% of body weight and the center of mass of cach thigh
is 18.0 cm from the hip joint. The patient also reads thal the two
lower legs (including the feet) are 14.0% of body weight, with a
center of mass 69.0 cm from the hip joint. The cast has a mass of
5.50 kg, and its center of mass is 78.0 cm from the hip joint. How
far from the hip joint should the supporting strap be atlached to
the cast?
Figure P11.51
Supporting
strap
Hip joint
Cast
Transcribed Image Text:11.51 * BIO Supporting a Broken Leg. A therapist tells a 74-kg patient with a broken leg that he must have his leg in a cast suspended horizontally. For minimum discomfort, the leg should be supported by a vertical strap allachcd at the center of mass of the leg-cast system (Fig. PI1.51). To comply with these instruc- Lions, the patient consults a table of typical mass distributions and finds that both upper legs (thighs) together typically account for 21.5% of body weight and the center of mass of cach thigh is 18.0 cm from the hip joint. The patient also reads thal the two lower legs (including the feet) are 14.0% of body weight, with a center of mass 69.0 cm from the hip joint. The cast has a mass of 5.50 kg, and its center of mass is 78.0 cm from the hip joint. How far from the hip joint should the supporting strap be atlached to the cast? Figure P11.51 Supporting strap Hip joint Cast
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