The 198-lb exerciser is beginning to execute a bicep curl. When in the position shown with his right elbow fixed, he causes the 23-lb cylinder to accelerate upward at the rate 0.30g. Neglect the effects of the mass of his lower arm and estimate the normal reaction forces at A and B. Friction is sufficient to prevent slipping.

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Q: Calculate total moment of the two forces about O. A 2m 0 A F1=5N 4m B F2=3N

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Q: Compute strain Stress-40 MPa Modulus of elasticity=100 MPa

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Q: The 160-lb exerciser is beginning to execute a bicep curl. When in the position shown with his right…

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Q: Find the value of maximum principal stress Maximum shear stress=80 MPa Minimum principal stress=30…

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Q: Find the force applied Work done=554.44 J Displacement=50 m

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.