Chapter 1, Problem 1.9P

(a)

Interpretation Introduction

Interpretation:

Whether a sled resting at the top of a hill or a sled sliding down the hill has higher kinetic energy is to be determined.

Concept introduction:

Energy is defined as the capacity to do work. It is associated with both physical and chemical changes.

The two types of energy are as follows:

1. Potential energy: It is the energy due to the position of the object relative to the other objects.

2. Kinetic energy: It is the energy that arises due to the motion of the objects.

(b)

Interpretation Introduction

Interpretation:

Whether water above the dam or water falling over the dam has higher kinetic energy is to be determined.

Concept introduction:

Energy is defined as the capacity to do work. It is associated with both physical and chemical changes.

The two types of energy are as follows:

1. Potential energy: It is the energy due to the position of the object relative to the other objects.

2. Kinetic energy: It is the energy that arises due to the motion of the objects.