Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 9, Problem 65GP
When a mass of 25 kg is hung from the middle of a fixed straight aluminum wire, the wire sags to make an angle of 12° with the horizontal as shown in Fig, 9-83 0. Determine the radius of the wire.
25 kg
Figure 9-83
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Chapter 9 Solutions
Physics: Principles with Applications
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- (II) Figure 9–50 shows a pair of forceps used to hold a thin plastic rod firmly. If the thumb and finger each squeeze with a force Fr = FF = 11.0 N, what force do the forceps jaws exert on the plastic rod? Jaws Rod Fr P FIGURE 9-50 8.50 cm 2.70 cm Problem 6.arrow_forwardWhen a mass of 25 kg is hung from the middle of a fixed straight aluminum wire, the wire sags to make an angle of 12° with the horizontal as shown in Fig. 9–83. Determine the radius of the wire. 12° 12°[ FIGURE 9-83 | 25 kg Problem 65.arrow_forwardA 25-kg object is being lifted by two people pulling on the ends of a 1.15-mm-diameter nylon cord that goes over two 3.00-m-high poles 4.0 m apart, as shown in Fig. 9–86. How high above the floor will the object be when the cord breaks? 25 kg FIGURE 9-86 Problem 69.arrow_forward
- Two identical, uniform beams are symmetrically set up against each other (Fig. 9–87) on a floor with which they have a coefficient of fric- tion µs = 0.50. What is the minimum angle the beams can make with the floor and still not fall? FIGURE 9-87 Problem 71.arrow_forward8arrow_forwardA cube of side l rests on a rough floor. It is subjected to a steady horizontal pull F, exerted a distance h above the floor as shown in Fig. 9-79. As Fis increased, the block will either begin to slide, or begin to tip over. Determine the coefficient of static friction us so that (a) the block begins to slide rather than tip; (b) the block begins to tip. [Hint: Where will the normal force on the block act if it tips?] h FIGURE 9–79 Problem 60.arrow_forward
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- MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A moonshiner makes the error of filling a glass jar to the brim and capping it tightly. The moonshine expands more than the glass when it warms up, in such a way that the volume increases by 0.3% (that is, AV/Vo = 3 x 10-3) relative to the space available. Calculate the force exerted by the moonshine per square centimeter if the bulk modulus is 1.7 x 109 N/m2, assuming the jar does not break. N/cm2 In view of your answer, do you think the jar survives? (Hint: How many atmospheres is this?) O No O Yes Additional Materialsarrow_forwardA heavy ball suspended by a cable is pulled to the side by a horizontal force F as shown in Fig. 9-43. If angle 0 is small, the magnitude of the force F can be less than the weight of the ball because: (a) the force holds up only part of the ball's weight. (b) even though the ball is stationary, it is not really in equilibrium. (c) F is equal to only the x component of the tension in the cable. (d) the original statement is not true. To move the ball, F must be at least equal to the ball's weight. FIGURE 9–43 MisConceptual Question 4.arrow_forwardA farmer making grape juice fills a glass bottle to the brim and caps it tightly. The juice expands more than the glass when it warms up, in such a way that the volume increases by 0.4%. Calculate the force exerted by the juice per square centimeter if its bulk modulus is 1.8 × 109 N/m2, assuming the bottle does not break.arrow_forward
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