Site MapHelpFeedbackQuestions for Thought
Questions for Thought
(See related pages)


How is work related to energy?

What is the relationship between the work done while moving a book to a higher bookshelf and the potential energy that the book has on the higher shelf?

Does a person standing motionless in the aisle of a moving bus have kinetic energy? Explain.

A lamp bulb is rated at 100 W. Why is a time factor not included in the rating?

Is a kWh a unit of work, energy, power, or more than one of these? Explain.

If energy cannot be destroyed, why do some people worry about the energy supplies?

A spring clamp exerts a force on a stack of papers it is holding together. Is the spring clamp doing work on the papers? Explain.

Why are petroleum, natural gas, and coal called fossil fuels?

From time to time, people claim to have invented a machine that will run forever without energy input and develops more energy than it uses (perpetual motion). Why would you have reason to question such a machine?

Define a joule. What is the difference between a joule of work and a joule of energy?

Compare the energy needed to raise a mass 10 m on Earth to the energy needed to raise the same mass 10 m on the Moon. Explain the difference, if any.

What happens to the kinetic energy of a falling book when the book hits the floor?

Physical ScienceOnline Learning Center with Powerweb

Home > Chapter 3 > Questions for Thought