10. Wedge Hammer A B 45° -450 mm Fig. 3.20 Neglecting the small amount by which the hammer rises after passing through the vertical through A and assuming that the hammer fees not rebound, find the value of R TAR: 0.30 KNJ Fig. 3.20 shows a tilt hammer, hinged at 0, with its head A resting on top of the pile B. The hammer, including the arm OA, has a mass of 25 kg. Its centre of gravity G is 400 mm horizontally from O and its radius of gyration about an axis through G parallel to the axis of the pin O is 75 mm. The pile has a mass of 135 kg. The hammer is raised through 45° to the position shown in dotted lines, and released. On striking the pile, there is no rebound. Find the angular velocity of the hammer immediately before impact and the linear velocity of the pile immediately after impact. Neglect any impulsive resistance offered by the earth into which the pile is being driven. [Ans. 5.8 rad/s, 0.343 m/s]

10. Wedge Hammer A B 45° -450 mm Fig. 3.20 Neglecting the small amount by which the hammer rises after passing through the vertical through A and assuming that the hammer fees not rebound, find the value of R TAR: 0.30 KNJ Fig. 3.20 shows a tilt hammer, hinged at 0, with its head A resting on top of the pile B. The hammer, including the arm OA, has a mass of 25 kg. Its centre of gravity G is 400 mm horizontally from O and its radius of gyration about an axis through G parallel to the axis of the pin O is 75 mm. The pile has a mass of 135 kg. The hammer is raised through 45° to the position shown in dotted lines, and released. On striking the pile, there is no rebound. Find the angular velocity of the hammer immediately before impact and the linear velocity of the pile immediately after impact. Neglect any impulsive resistance offered by the earth into which the pile is being driven. [Ans. 5.8 rad/s, 0.343 m/s]

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

Question

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10.
Wedge
Hammer
A
B
45°
-450 mm
Fig. 3.20
Neglecting the small amount by which the hammer rises after passing through the vertical through
A and assuring that the hammer does not rebound, find the value of R
Fig. 3.20 shows a tilt hammer, hinged at 0, with its head A resting on top of the pile B. The
hammer, including the arm OA, has a mass of 25 kg. Its centre of gravity G is 400 mm horizontally
from O and its radius of gyration about an axis through G parallel to the axis of the pin O is 75 mm.
The pile has a mass of 135 kg. The hammer is raised through 45° to the position shown in dotted
lines, and released. On striking the pile, there is no rebound. Find the angular velocity of the
hammer immediately before impact and the linear velocity of the pile immediately after impact.
Neglect any impulsive resistance offered by the earth into which the pile is being driven.
[Ans. 5.8 rad/s, 0.343 m/s]

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