Chapter 1.6, Problem 11E

A)

Interpretation Introduction

Interpretation:

To determine the change in potential energy of the object when it fall from height of 25 meter.

Concept introduction:

The change in potential energy.

$\Delta \text{P}\text{.E}=Mg\left(h_{\text{final}}-h_{\text{initial}}\right)$

Here, mass of an object is M, gravitational constant is g, and initial height is $h_{\text{initial}}$, and height above the ground for an object is $h_{\text{final}}$.

B)

Interpretation Introduction

Interpretation:

To determine the change in kinetic energy of the object when it its velocity increases from 0 m/s to 50 m/s.