# Answer to Question #74614 in Mechanical Engineering for Khalid

Question #74614

Task 1: A pile driver hammer of mass 272 kg falls freely through a distance of 4.2 m to strike a pile of mass 516 kg and drives it 75 mm into the ground. The hammer does not rebound when driving the pile. Determine the average resistance of the ground. (Compare, use and contrast the use of D’Alembert’s principle with the principle of Conservation of

Energy when solving the problem given in Task 1. You must fully answer each task and show all steps, including text. You must include labelled diagrams to aid your solutions).

Energy when solving the problem given in Task 1. You must fully answer each task and show all steps, including text. You must include labelled diagrams to aid your solutions).

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