6.141 A steel ingot weighing 8000 lb is lifted by a pair of tongs as shown.Determine the forces exerted at C and E on the tong BCE. A35 in.A55 in.CFig. P6.14114 in.45 in.8000 lb-55 in.DBFB

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Engineering

Civil Engineering

Determine the forces exerted at C and E on the tong BCE.

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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Concept explainers

System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.

Question

6.141 A steel ingot weighing 8000 lb is lifted by a pair of tongs as shown.
Determine the forces exerted at C and E on the tong BCE.

A
35 in.
A
55 in.
C
Fig. P6.141
14 in.
45 in.
8000 lb
-55 in.
D
B
F
B

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Follow-up Question

6.142 If the toggle shown is added to the tongs of Prob. 6.141 and the load is
lifted by applying a single force at G, determine the forces exerted at
C and E on the tong BCE.

A
8000 lb
G
-73 in.-
Fig. P6.142
B
20 in.

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