A person carries a 135 N weight held close to the chest. Estimate, using simple statics...
A person carries a 135 N weight held close to the chest. Estimate, using simple statics model, the compressive force on the mid-lumbar vertebra and the the force in the back muscles. If the weight is held with the arms extended horizontally in front of the chest, what are the muscle and lumbar vertebral forces estimated to be?
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A person carries a 135 N weight held close to the chest.
Estimate, using simple statics...
A person bending forward to lift a load "with his back" (Figure a) rather than "with...
A person bending forward to lift a load "with his back" (Figure a) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces involved, and to understand why back problems are common among humans, consider the model shown in Figure b, of a...
51. A person bending forward to lift a load "with his back" (Fig. P12.51a) rather than...
51. A person bending forward to lift a load "with his back" (Fig. P12.51a) rather than with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces in- volved, and to understand why back problems are com- mon among humans, consider the model shown in Figure...
17 BIO A person bending forward to lift a load "with his back" (Fig. P8.17a) rather...
17 BIO A person bending forward to lift a load "with his back" (Fig. P8.17a) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces involved, and to understand why back problems are common among humans, con- sider the model shown in Figure...
17 BIO A person bending forward to lift a load "with his back" (Fig. P8.17a) rather...
17 BIO A person bending forward to lift a load "with his back" (Fig. P8.17a) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces involved, and to understand why back problems are common among humans, con- sider the model shown in Figure...
51. A person bending forward to lift a load "with his back" (Fig. P12.51a) rather than with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces in- volved, and to understand why back problems are com- mon among humans, consider the model shown in Figure...
17 BIO A person bending forward to lift a load "with his back" (Fig. P8.17a) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces involved, and to understand why back problems are common among humans, con- sider the model shown in Figure...
17 BIO A person bending forward to lift a load "with his back" (Fig. P8.17a) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force provided by the erector spinalis muscle in the back. To see the magnitude of the forces involved, and to understand why back problems are common among humans, con- sider the model shown in Figure...
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