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]

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.72P

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