Taking moment,
(350 x L/2) + (200 L) = 375 L ....... (1)
T sin 12 x 2L/3 = 0.139 TL ........ (2)
From equation (1) and (2)
375 L = 0.139 TL
A)
T = 2697.84 N
B)
F = T cos12 = 2638.89 N
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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...
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...