Question

A pile driver of mass 125kg falls through a height of 80m before striking the pile. What is it's momentum at the instance it strikes the pile? g=10m/s2?

Answer 1

V^2 = Vo^2 + 2g*h = 0 + 20*80 = 1600,
V = 40 m/s.

Momentum = M * V ____kg-m/s.