- #1

Grinter1

- 5

- 0

## Homework Statement

A pile-driver hammer of mass 150kg falls freely through a distance of 5m to strike a pile of mass 400kg and drives it 75mm into the ground. The hammer does not rebound when driving the pile. Determine the average resistance of the ground. You are required to solve this problem in two ways:

(a)By making use of the principle of conservation of momentum and D'lamberts principle

(b)By making use of the conservation of energy

## Homework Equations

v=u+at

v2(squared)=u2(squared)+2as

S=ut+0.5at2(squared)