Essay Quiz


1		How is work related to energy?



2		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?



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



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



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



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



7		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.



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



9		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?



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



11		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.



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

2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.