Fundamentals of Physics, Volume 1, Chapter 1-20

10th Edition

ISBN: 9781118233764

Author: David Halliday

Publisher: WILEY

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Textbook Question

Chapter 12, Problem 65P

In Fig. 12-73, a uniform beam with a weight of 60 N and a length of 3.2 m is hinged at its lower end, and a horizontal force F → of magnitude 50 N acts at its upper end. The beam is held vertical by a cable that makes angle θ = 25° with the ground and is attached to the beam at height h = 2.0 m. What are (a) the tension in the cable and (b) the force on the beam from the hinge in unit-vector notation?

Chapter 12, Problem 65P, In Fig. 12-73, a uniform beam with a weight of 60 N and a length of 3.2 m is hinged at its lower

Figure 12-73 Problem 65.

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Chapter 12, Problem 64P

Chapter 12, Problem 66P

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- 5. Two identical, uniform beams of length 3 m and weighing 260 N each are connected at one end by a frictionless hinge. A light horizontal crossbar, attached at the midpoints of the beams maintains an angle 50° between the beams. The beams are suspended from the ceiling by vertical wires so they form a V. See figure. (a) What force does the crossbar exert on each beam? (b) Is the crossbar under compression or tension, i.e. are the ends of the crossbar being pushed together or stretched farther apart? (c) What force (magnitude and direction) does the hinge exert on each beam? Crossbar Hinge

a vertical uniform beam of length Lthat is hinged at its lower end.A horizontal force F is applied to the beam at distance y from the lower end. The beam remainsvertical because of a cable attached at the upper end, at angle uwith the horizontal. gives the tension T in the cableas a function of the position of the applied force given as a fractiony/L of the beam length.The scale of the T axis is set by Ts= 600 N.Figure 12-49c gives the magnitude Fh of the horizontal force on thebeam from the hinge, also as a function of y/L. Evaluate (a) angle uand (b) the magnitude of .

1. (1) Three forces are applied to a tree sapling, as shown in Fig. 12-45, to stabilize it. If FA = 385 N and FB = 475 N, find Fe in magnitude and direction. FB FIGURE 12-45 FC Problem 1. FIGURE 12-46 Problem 2. 2. (1) Approximately what magnitude force, FM, must the extensor muscle in the upper arm exert on the lower arm to hold a 7.3-kg shot put (Fig. 12-46)? Assume the lower arm has a mass of 2.3 kg and its CG is 12.0 cm from the elbow-joint pivot. 2.5 cm FM -30.0 cm- 105° Elbow joint FA

Chapter 12 Solutions

Fundamentals of Physics, Volume 1, Chapter 1-20

Ch. 12 - Figure 12-15 shows three situations in which the...Ch. 12 - In Fig, 12-16, a rigid beam is attached to two...Ch. 12 - Figure 12-17 shows four overhead views of rotating...Ch. 12 - A ladder leans against a frictionless wall but is...Ch. 12 - Figure 12-18 shows a mobile of toy penguins...Ch. 12 - Figure 12-19 shows an overhead view of a uniform...Ch. 12 - In Fig. 12-20, a stationary 5 kg rod AC is held...Ch. 12 - Three piatas hang from the stationary assembly of...Ch. 12 - In Fig. 12-22, a vertical rend is hinged at its...Ch. 12 - Figure 12-23 shows a horizontal block that is...

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