COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 9, Problem 48QAP
To determine
How much will the ligament stretch if a force of
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EXAMPLE. Assume a leg has 1.2m shaft of bone with an average
cross-sectional area of 3x104m². What is amount of shortening when
all of the body weight of 700 N is supported on this leg.
Orb Spiders make silk with a typical diameter of 0.15mm.
1)A typical orb spider has a mass of 0.50 g. If the spider suspended so from a single 12 cm long strand of self, by how much will the self stretch?
2)What is the maximum weight that a single strand of silk and support?
3)why do you have to lean forward when standing from a chair?
Example 2:
Assume a leg has 0.6 m shaft of bone with an average
cross sectional area of 1.5 cm², What is the amount of
shortening when all of the body weight of 350 N is
supported on the leg:
Chapter 9 Solutions
COLLEGE PHYSICS
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- A 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 0.2 . Calculate the force exerted by the juice per square centimeter if its bulk modulus is 1.8109N/m2 , assuming the bottle does not break.arrow_forwardAssume Youngs modulus for bone is 1.50 1010 N/m2. The bone breaks if stress greater than 1.50 108 N/m2 is imposed on it. (a) What is the maximum force that can be exerted on the femur bone in the leg if it has a minimum effective diameter of 2.50 cm? (b) If this much force is applied compressively, by how much does the 25.0-cm-long bone shorten?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 0.2% (that is, V/V0=2103 ) relative to the space available. Calculate the magnitude of the normal force exerted by the juice per square centimeter if its bulk modulus is 1.8109 N/m2, assuming the bottle does not break. In view of your answer, do you think the bottle will survive?arrow_forward
- What Is Static Equilibrium? Problems 13 are grouped. 1. C A ball is attached to a strong, lightweight rod (Fig. P14.1). The rod is supported by a horizontal pin near the top. The ball is at rest. Is the ball in static equilibrium? If not, why not? If so, which type of equilibrium is itstable, unstable, or neutral? Hint: What would happen if you displaced the ball slightly? FIGURE P14.1arrow_forwardA brass wire and a steel wire, both of the same length, are extended by 1.0 mm under the same force. Is the cross-sectional radius of the brass wire more, less, or equal to the cross-sectional radius of the steel wire? Explain. Youngs moduli for brass and steel are 1.0 1010 N/m2 and 2.0 1011 N/m2, respectively.arrow_forward(a) Estimate the force with which a karate master strikes a board, assuming the hands speed at the moment of impact is 10.0 m/s and decreases to 1.00 m/s during a 0.002 00-s time interval of contact between the hand and the board. The mass of his hand and arm is 1.00 kg. (b) Estimate the shear stress, assuming this force is exerted on a 1.00-cm-thick pine board that is 10.0 cm wide, (c) If the maximum shear stress a pine board can support before breaking is 3.60 106 N/m2, will the board break?arrow_forward
- A HOMEWRK-1: The average cross-sectional area of leg 3 cm² and all of body weight 700 N supported of this leg, and the amount of shorting (AL) = 0.15 mm find the length of this leg in meter if you know that young's modulus of the bone is 1.8 * 10¹0 N/m². ANSWER L = 1.157 m L? A--3X1=4 F-100 16 4 - 1881-arrow_forward10. Calculate the second moment of area for a 2 x 6 piece of lumber about the x-x and y-y axes, as shown. y X yarrow_forwardFor the hinged beam and cable in example 9-6, what would happen to the tension in the cable as the angle was increased? Would the tension increase, decrease or stay the same? Show your reasoning.arrow_forward
- A circular rod of cross-sectional area 2 x 104 m² has a tensile force of 80 kN applied to it. The stress in the rod is Select one: a. 4.0 x 106 Pa b. 0.4 x 10° Pa O c. 40 x 104 Pa Previous page Formula Sheet, CA-2, T-3, AY Jump to... Activate Windo 20-21 Go to Settings to act hparrow_forward1.)When two wires of identical dimensions are used to hang 25 kg weights, wire A is observed to stretch twice as much as wire B. From this observation, you can make the following conclusions about the Young’s moduli of these wires: a.) YA = 4YB b.) YA = 2YB c.) YA = YB d.) YA = YBarrow_forwardQ2- A biological tissue underwent tensile tests, subjected to the axial load P. a) Determine the average normal (ơ) and average shear stresses (t) acting over area section shown below(A'), which is oriented at angle 0 from the horizontal, as a function of 0 and vertical cross section A. b) Determine angle 0 where o=3 t. (24 points) A'=A/sin0 P 01 A (Results: o =- (sine)²,t = - sin0 cose,0 = 71.56°) %3D A Аarrow_forward
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