Question

Pilings are driven into the ground at a building site by dropping a 2150 kg object onto them. What change in gravitational potential energy does the object undergo if it is released from rest 17.0 m above the ground and ends up 1.90 m above the ground? change in gravitational potential energy: J

Answer 1

Mass of the object M = 2150 Kg

Object released from the undergo h2 = 17 m above the ground and ends at h1= 1.9 m above the ground

Therefore the change in potential energy can be written as the difference in the potential energy of the object at different height

Potential energy can be written as

P.E = Mgh

But here in problem we are going to write potential energy like

Change in potential energy ∆P.E

АР.Е — Р.E1 - Р.E2 — тдh2 — h1)

AP.E P.E1 - P.E2 2150 9.81(17 1.9)

∆P.E =318481.65 J

This is the change in gravitational potential energy.