The uniform bar AB is 2-m long andhas a mass of 5-kg. The bar issupported by rough surface at A andthe frictionless surface at B. Thecoefficient of static friction at A is 0.8.If the bar is initially at rest, determinethe force P that will cause the bar tobegin moving.-frictionlessBm= 5kgL=2 mH= 0.80.5 m70°

Given: Mass of the bar, m = 5 kg Length of the bar, L = 2 m Coefficient of friction at point A, µA =…

Answered: The uniform bar AB is 2-m long and has…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The system lamp has a mass M and is supported by the six strings shown. The length of the chords and the horizontal distance ED are constant, point E remains fixed but the vertical distance ED can vary. a) If in the position shown the chord BC is horizontal, calculate the angle ? to maintain equilibrium, consider the mass M = 10 kg. b) Explain what happens to the magnitude of the stresses when point D moves.
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Question 4: A machine of 540 kg is bolted at the middle of two parallel simply supported steel beams. The clear span of the beam is 2.4 m. The moment of inertia of the cross-section of each beam is I = 4.2×10¯6 mª. The Young's modulus of the steel is E 200 GPa. When the machine is operating, it will generate a vertical force P(t)=Posinot. When the machine runs at 300 rpm, Po= 1500 N. Neglect the weight of the beams and assume 2% viscous damping in the system. Determine the amplitude of steady-state deflection of the beams at their midpoint when the machine runs at 300 rpm. machine 1.2 m = 1.2 m Steel beams
2.3.5
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Question 5 T/2 В 1200 Nm A homogeneous steel shaft (G=83GPA) is loaded as shown in the above Figure. Assuming T = 300 N-m, determine the torsional force in N-m in Member BC. Note: Include sign (+/-), assuming the direction of Torsion (T) at D is positive Given: AB: Length = 1.75m, Diameter = 75mm BC: Length = 1.50m, Diameter = 60mm AB: Length = 1.00m, Diameter = 40mm
The cantilever beam shown is an aluminum pipe that has an outside diameter of 114 mm and an inside diameter of 97.3 mm. A moment of 3 kN-m is applied at the free end. Find the rotation at the free end of the pipe. Neglect the weight of the pipe. М 33KN.m 2m Mod. of Mod. of Coeff, of Elasticity Rigidity G Thermal Ultimate Strength Density kg /m3 x 10 Tensile Yield Strength F, MPa Expansion a m/m/C x 10-6 Poisson's MPa MPa MPa Ratio Material x 10 x 10 Tens. Comp. Shear Steel ASTM A36 or A501 7.85 207 83 250 400 11.7 0.25 Steel (high-strength low-alloy) ASTM A992 7.85 207 83 345 450 11.7 0.25 Steel AISI 1020 hot-rolled 7.85 207 79.3 210 380 11.7 0.25 Steel AISI 1040 hot-rolled 7.85 207 79.3 290 520 11.7 0.25 Stainless steel 7.85 200 80 280 580 410 11.7 0.25 (annealed) Cast iron (gray) 7.21 103 41 140 550 220 10.6 0.26 Aluminum allov 2.64 70 28 240 260 190 23.6 0.33 6061-T6 Magnesium alloy 1.794 45 17 210 280 140 26.1 0.34 Titanium alloy 4.40 114 45 900 970 690 9.7 Nominal Outside Inside…

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