Exam 4: Work and Energy

Which of the following is not a unit of power?

The potential energy of a pendulum is greatest

The kinetic energy of a pendulum is greatest

Some food costs may rise in the future as a consequence of the increased use of which food-based fuel?

It is estimated that the global reserve of methane hydrate is ______________ the global reserves of coal, oil, and natural gas.

Which of the following four objects has different kinetic energy?

One ______________ is equal to one joule per second.

The average adult radiates heat energy at the same rate as

An object of mass 2 kg has a speed of 8 m/s and moves a distance of 6 m. What is its kinetic energy in joules?

A ball is dropped from an upper-story dorm window. Neglecting air resistance, what is the speed of the ball when it has fallen 2.5 m? ​ ​

A student weighing 200 N climbs a flight of stairs 9.0 m high in 4 s. What power is required to perform this task?

Currently, in the United States, which sector of the economy uses the most energy?

A system for which there are no outside effects is said to be ______________.

A force of 7.2 N acting on a 1.0-kg object initially at rest moves it through a parallel distance of 2.5 m. Neglecting friction, what is the speed of the object when it is moved 2.5 m? ​ ​

The two types of mechanical energy are ______________ and ______________.

Car B is traveling twice as fast as car A, but car A has twice the mass of car B. Which car has the greater kinetic energy and by what factor is it greater?

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?

Currently, in the United States, which fuel has the largest consumption?

One watt is equal to one joule per ______________.

The United States' most abundant fuel supply is ______________.