Question

A pile driver drives a stake into the ground.the mass of the pile is 2500kg and it is dropped through a height of 10m on each stroke.the resisting force of the ground for this stake is e ×108N. how far is h stake driver on each stroke

Answer 1

From the conservation of energy:

$$mgH=Fh$$

$$(2500)(9.8)(10)=(e \cdot10^8)h$$

$$h=0.0009\ m=0.9\ mm$$