3. The pile P has a mass of 800kg and is being driven into loose sand using the hammer C which is dropped 0.5m from the top of the pile. Determine the required mass of the hammer to drive the pile into the sand by 34.8mm after one blow if the sand offers a frictional resistance against the pile of 18kN. The coefficient of restitution between the hammer and the pile is e = 0.1. Neglect the impulses due to the weights of the pile and hammer and the impulse due to the sand during the impact. 0.5 m

3. The pile P has a mass of 800kg and is being driven into loose sand using the hammer C which is dropped 0.5m from the top of the pile. Determine the required mass of the hammer to drive the pile into the sand by 34.8mm after one blow if the sand offers a frictional resistance against the pile of 18kN. The coefficient of restitution between the hammer and the pile is e = 0.1. Neglect the impulses due to the weights of the pile and hammer and the impulse due to the sand during the impact. 0.5 m

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 7.79P: The coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a)...

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