Chapter 4, Problem 9PE

(a)

Interpretation Introduction

Interpretation:

The energy of spinning blades of a fan are a potential or kinetic energy has to be given.

Concept Introduction:

Potential energy:

• Potential energy is the stored energy in an object or system because of its position.
• Potential energy is not relative to the environment of an object.
• Potential energy cannot be transferred.
• Example: water at the top of a waterfall.

Kinetic energy:

• The energy of a body or system with respect to the motion of the body or of the particles in the system.
• Kinetic energy of an object is relative to other moving and stationary objects in its immediate environment.
• Kinetic energy can be transferred from one moving object to another.
• Example: water flow.

(b)

Interpretation Introduction

Interpretation:

The energy of flying bird is a potential or kinetic energy has to be given.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The energy stored in a sodium hydroxide in a sealed jar is a potential or kinetic energy has to be given.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The energy stored in a person napping is a potential or kinetic energy has to be given.

Concept Introduction:

Refer to part (a).

(e)

Interpretation Introduction

Interpretation:

The energy of rippling ocean waves is a potential or kinetic energy has to be given.

Concept Introduction:

Refer to part (a).