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physics
december 2019
20

Physics Questions and Answers December 20, 2019

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2. Figure 1 shows the free body diagram of an arm holding a dumbbell on the hand. The weight of the forearm and hand is 20 N and the dumbbell weighs 250 N. Calculate the biceps muscle force Fm in order to maintain the elbow and the forearm at an equilibrium position. (Given that dl 0.05 m, d2 0.16 m, and d3 0.45 m) 250N Figure I 3. The middle

The boom in the figure below (Figure 1) weighs 2450 N and is attached to a frictionless pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 37.0 % of its length. a)Find the tension in the guy wire. b)Find the horizontal component of the force exerted on the boom at its lower end. c)Find the vertical

Guy wire Boom 60.0 5000 N

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