Although the United States has less than 5% of the world’s population, it accounts for approximately ______________ of the world’s annual consumption of fossil fuels.

A 2-hp motor can do the same amount of work as a 1-hp motor in ______________ the time. n

Energy resulting from motion is called ______________.

A 0.10-kg ball is dropped from a height of 10 m and rebounds to a height of 8.0 m. a. Is energy conserved in the ball? b. If not, how much energy was lost, and what happened to it?

In pushing an object on a level surface, work is done against ______________.

A student weighing 700 N climbs a flight of stairs 5.0 m high. Calculate the work done.

In lifting an object, work is done against ______________.

Mechanical energy

The sum of the kinetic energy and potential energy is called ______________ energy.

A watt is one ______________ per second.