Question

A rock of mass 2.0 kg is dropped from rest from the top of a house.

When it hits the ground, it has 225 J of kinetic energy.

Calculate the height of the house.

Answer 1

Step-by-step explanation:

Given:

m = 2.0 kg

Wk = 225 J

__________

H - ?

Wp = m*g*H

Wp = Wk

m*g*H = 225

H = 225 / (m*g) = 225 / (2.0*9.8) ≈ 11,5 m