1. The boom of the wall crane 4m long is held at right angles to the wall by a wire that isattached to the wall 3m above the foot of the boom. If the load lifted is 45000N, find thetension in the wire and the compression force in the boom Neglect the weight of theboom.2. A square is acted upon by the forces of 4, 6, 8, and 12N respectively along the four sidesas shown. If the length of the side of the square is 0.5m, what is the resultant torqueacting to rotate the square about an axis through A?jON4N12N8N3.Two people carry a heavy electric motor by placing it on a light board 2.00 m in length.One person lifts at one end with a force of 700N, and the other lifts the opposite end witha force of 500N. What is the weight of the motor, and where along the board is its centerof gravity located? (Note: The center of gravity of an object is the point where theweight passes through.)4. A uniform ladder 10m long and weighing 350N rests against a smooth wall at an angleof 30° with the wall. A 700N man stand 6m up from the bottom of the ladder. Find thehorizontal force necessary at the base to keep the ladder from slipping.

1.given data tanθ=34θ=36.86°

The boom of the wall crane 4m long is held at right angles to the wall by a wire that is attached to the wall 3m above the foot of the boom. If the load lifted is 45000N, find the tension in the wire and the compression force in the boom Neglect the weight of the boom.

The boom of the wall crane 4m long is held at right angles to the wall by a wire that is attached to the wall 3m above the foot of the boom. If the load lifted is 45000N, find the tension in the wire and the compression force in the boom Neglect the weight of the boom.

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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Question

1. The boom of the wall crane 4m long is held at right angles to the wall by a wire that is
attached to the wall 3m above the foot of the boom. If the load lifted is 45000N, find the
tension in the wire and the compression force in the boom Neglect the weight of the
boom.
2. A square is acted upon by the forces of 4, 6, 8, and 12N respectively along the four sides
as shown. If the length of the side of the square is 0.5m, what is the resultant torque
acting to rotate the square about an axis through A?
jON
4N
12N
8N
3.
Two people carry a heavy electric motor by placing it on a light board 2.00 m in length.
One person lifts at one end with a force of 700N, and the other lifts the opposite end with
a force of 500N. What is the weight of the motor, and where along the board is its center
of gravity located? (Note: The center of gravity of an object is the point where the
weight passes through.)
4. A uniform ladder 10m long and weighing 350N rests against a smooth wall at an angle
of 30° with the wall. A 700N man stand 6m up from the bottom of the ladder. Find the
horizontal force necessary at the base to keep the ladder from slipping.

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