Mechanics of Rigid bodies 2. A cage for transporting workers and supplies on a construction site is hoisted bya crane as shown. The floor of the cage is rectangular with dimensions1.8 m x2.4 m x 0,6 m. Each of the four lifting cables Is attached to a corner of the cageand is 3,96 m long. The weight of the cage and its contents is limited byreguiations to 48 KN.a) Compute the value of "H".b) Compute the force of one cable. A0.Gm2.4 m

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Answered: 2. A cage for transporting workers and…

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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A 5-kip crate is supported by a pulley system and a horizontal force P.a) Find P and the angle α. Report your answer in kips (1 kip = 1000 lbs).b) For this problem if you double the weight of the crate, will the force P double? Briefly explain why or why not.
Problem 4.24 The tower crane is used to hoist a 2.1-Mg load upward at constant velocity. The 1.4-Mg jib BD and 0.4-Mg jib BC have centers of mass at G₁ and G2, respectively. (Figure 1) Figure 1 of 1 G G3-7.5 m 4 m 23 m B 9.5m -12.5 m G₁ < Part A Determine the required mass of the counterweight C so that the resultant moment produced by the load and the weight of the tower crane jibs about point A is zero. The center of mass for the counterweight is located at G3. Express your answer to three significant figures and include the appropriate units Mc = Submit 0 μĂ Value Units My Answers Give Up Provide Feedback ? Continue
Question 2 Figure Q2 shows a 20 m Warren steel bridge with 9 equilateral triangles use for crossing Sungai Jernih, Perlis. Determine the force in member IH, ID, ČD, GH and GE of the truss indicate whether the members are in tension or compression. Show all calculations. 6 kN 9 kN K J H 3 kN 2.6 m F в с D E 5 @ 4 m = 20 m Figure Q2: A Warren steel bridge
Determine the unstretched length of DB to hold the40-kg crate in the position shown. Take k = 180 N>m.
Question 6 What will be the value of P in kN if below structure collapses in a purely sway mechanism? Round your answer to one decimal digit. Plastic moment for all members = 46 kN.m L = 4 m Round your answer to 1 decimal place. Shipping Tool с P→ B A L L D #F L P/₂ E
1. A triangular gate with a horizontal base 1.5 m long and an altitude of 2.1 m is inclined 42" from the vertical with the vertex pointing upward. The hinged horizontal base of the gate is 2.9 m below the oil surface. a. Calculate the total force of oil on the gate. b. How far is the said force from the vertex measured along the gate? c. What normal force must be applied at the vertex of the gate to open it?
1. The 60 kg crate has its center of gravity at G. Coefficient of static friction is 0.3. a. Find the smallest P that will initiate motion when e = 0° b. Find the smallest P that will initiate motion when 0 = 30° c. Find the smallest P so that the block will move without tipping when 0 = 30° 1.0 m 1.2 1.2 m l0.5 m 04 m
Please make sure to draw all diagrams. All units must be included. Problem 3: Note: Make sure to draw all diagrams. All Units must be included. 1. Determine the stretch in each of the two springs required to hold the 20kg crate in the equilibrium position shown. Each spring has an un- stretched length of 2m and a stiffness of k=300N/m. Ans. SA 0.218m, Sg 0.327m 12 m 1. Draw Free-Body Diagram(s) 2. Write Equations of Equilibrium 4 m 6 m 3. Solve for all unknown forces 4. Find the Stretch in each of the two springs
A load of lumber weighing W = 52 kN is being raised by a mobile crane. The weight of the boom ABC and the combined weight of the truck and driver are as shown. P = 4 kN. Determine the %3D reaction at each of the two (a) front wheels H in kN. Write numerical value only and in 2 decimal places. 0.6 m 0.4 m - 2.0 m- + 0.3 m C -E В D F P W 50 kN K -2.0 m- 2.0 m -0.5m 0.9 m
7.30 The 60-kg crate has its center of gravity at G. Determine the smallest force P that will initiate motion if 0 = 0°. Answer: 176.6 N Im 1.2 m 0.5 m H = 0,3- -0.4 m어
4. The 60 kg crate has its center of gravity at G. Coefficient of static friction is 0.3. a) Find the smallest P that will initiate motion when e= 0°. b) Find the smallest P that will initiate motion when e= 30°. c) Find the smallest P so that the block will move without tipping when e= 30°. 2.
3. A heavy machine is being lifted from the ground up a building using a set of pulleys with rope. The end of the rope moves at 5m/sec and the machine rises at 1 m/sec. The end of the rope is attached to a hoist mounted at the ground. 3.1. As the machine slowly lifts off the ground, the tension on the rope near the hoist is 1000 N, what is the weight of the machine? 3.2. As the machine being lifted, the rope near the hoist snapped, sending it falling to the ground. How much is the acceleration of the rope at the snapped end?

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